SK282402B6 - Dihydrobenzopyran derivatives, method and intermediates for their production, their use and pharmaceutical preparation based on them - Google Patents

Abstract

The present invention is concerned with compounds of formula the pharmaceutically acceptable acid addition salts thereof, and the stereochemically isomeric forms thereof, wherein R1 is hydrogen or C1-6alkyl; R2 is hydrogen or C1-6alkyl; R3 is hydrogen or C1-6-alkyl; R4 is hydrogen, halo, C1-6alkyl, hydroxy, C1-6alkyloxy, aryloxy or arylmethoxy; R5 and R6 designate R5a and R6a wherein R5a and R6a taken together form a bivalent radical; or R5 and R6 can designate R5b and R6b wherein R5b is hydrogen and R6b is a heterocycle or an optionally substituted alkenyl or alkynyl group; or R5 and R6 designate R5c and R6c, wherein R5c and R6c are hydrogen, halo, C1-6alkyl, C3-6alkenyl, C3-6alkynyl, hydroxy, C1-6alkyloxy, cyano, aminoC1-6alkyl, carboxyl, C1-6alkyloxycarbonyl, nitro, amino, aminocarbonyl, C1-6alkylcarbonylamino, or mono-di(C1-6alkyl)amino; Q is a heterocyclic ring containing at least one nitrogen atom or a radical of formula pharmaceutical compositions, preparations and use as a medicine are also described.

Description

Technical field

The invention relates to certain dihydrobenzopyran derivatives, processes and intermediates for their preparation, their use and pharmaceutical compositions based thereon. Said derivatives are suitable for the prevention and / or treatment of disorders characterized by excessive vasodilation, in particular migraine.

BACKGROUND OF THE INVENTION

Migraine is a non-lethal disease affecting 10% of the population. Its main symptom is headache and other symptoms are vomiting and photophobia. For many years, the most widespread treatment for migraine has been the administration of ergotalkaloids, which, however, have several adverse side effects. Recently, a tryptamine derivative has been introduced as a novel anti-migraine drug; t. j. sumatriptan. It has now surprisingly been found that the further characterized novel dihydrobenzopyran derivatives have 5-HT 1A agonist activity. and can therefore be used in the treatment of disorders characterized by excessive vasodilation, particularly migraine.

SUMMARY OF THE INVENTION

The present invention relates to dihydrobenzopyran derivatives of the general formula (I) ^R 1 with ^{R 1} , N 1 - N - Alt 4 NQ ^{(I> R} * '*'

R ⁴ wherein R ¹ , R ² and R ³ each independently represent hydrogen or C 1 -C 6 alkyl;

R ⁴ is hydrogen, halogen, C 1 -C 6 alkyl, hydroxy, C 1 -C 6 alkoxy, aryloxy or arylmethoxy;

R ⁵ and R ⁶ represent R ^5a and R ^6a , wherein R ^5a and R ^{6a taken} together represent a bivalent radical which is bonded at positions 7 and 8 of the dihydrobenzopyrazine moiety and corresponds to the general formulas (a1) to (al5)

-CH = CH-CH = CH- (L), - (CH ₂ ) _t -Z- (A9), - _(CH2) "- (A2), -Z- (CH ₂ ) _t - (ALO). - (CH ₂ ) _m -X- (A3), -CH = CH-Z- (All). -X- (CH ₂ ) _m - (A4), -Z-CH = CH- (Al2), -CH = CH-X- (A5), -NH-C (S) -N- (Al3). -X-CH = CH- (A6), -O-C (A) = N- (AL4). -O- _(CH2), - Y (A7), -N = C (A) -O- (AL5); Y- (CH _{2) t} -O- (A8).

wherein one or two hydrogen atoms are optionally substituted with (C 1 -C 6) alkyl, (C 1 -C 6) alkylcarbonyl or (C 1 -C 6) alkylsulfonyl;

n is 3 or 4;

X at each occurrence is independently -O-, -S-, -S (O) -, -S (O) ₂ -, -C (O) -, or -NR ⁷ -;

m, at each occurrence, independently represents 2 or 3;

Y at each occurrence is independently -O-, -S-, -S (O) -, -S (O) ₂ -, -C (O) -, or -NR ⁷ -,

Z is -O-C (O) -, -C (O) -O-, -NH-C (O) -, or -C (O) -NH-;

t, for each occurrence, is 1 or 2;

R ⁷ is hydrogen, C 1 -C 6 alkyl, C 1 -C 6 alkylcarbonyl or C 1 -C 6 alkylsulfinyl; and

A, at each occurrence, is independently hydroxy, (C 1 -C 6) alkyl or (C 1 -C 6) alkoxy; or

R ⁵ and R ⁶ are R ^5b and R ^6b , wherein R ^5b is hydrogen and R ^6b is C 1 -C 6 hydroxyalkyl, C 1 -C 6 carboxyalkyl, C 1 -C 6 alkoxycarbonylalkyl and 1 to 6 carbon atoms in the alkyl radical, trihalomethyl, alkylcarbonyl of 1 to 6 carbon atoms in the alkyl radical, alkoxycarbonylalkylthio of 1 to 6 carbon atoms in the alkoxy and 1 to 6 carbon atoms of the alkyl radical, carboxyalkylthio of the 1 to 6 carbon atoms. the alkyl group, alkylthio of 1 to 6 carbon atoms, alkylsulfmylskupinu of 1 to 6 carbon atoms, arylthio or arylsulfinylskupinu, or R @ ^6b is a radical of formula (bl) and (BL3)

R ¹⁰ —CeC-R ¹ (b1). —CH = CH-R '(b2), - ^(b3) '

R ¹⁶ (ts), her r ” (B6), (b8),. (B9). 'y (bI3) 1

R ⁸ and R ⁹ each independently represent hydrogen, carboxy, C 1 -C 6 alkoxycarbonyl, aminocarbonyl or C 1 -C 6 monocarbonyl or di (alkyl) aminocarbonyl;

R ¹⁰ , R ¹¹ , R ¹² ', R ¹³ , R ¹⁴ , R ¹ , R ¹⁶ and R ¹⁷ each independently represent hydrogen, halogen or C 1 -C 6 alkyl;

R ¹⁸ , R ¹⁹ , R ²⁰ , R ²¹ , R ²² , R ²³ , R ²⁴ and R ²⁵ each independently represent hydrogen or C 1 -C 6 alkyl, or

R ⁵ and R ⁶ is R ⁵⁰ and R ^b, in which case R ⁴ represents only hydrogen and R ^5c and R ^{6 t} are each independently hydrogen, halogen, C 1 -C 6 alkyl, C 3 to C 6 carbon atoms, (C 3 -C 6) alkynyl, hydroxy, (C 1 -C 6) alkoxy, cyano, (C 1 -C 6) aminoalkyl, carboxy, (C 1 -C 6) alkoxycarbonyl, nitro, amino, a (C 1 -C 6) alkylcarbonylamino group or a mono- or di (C 1 -C 6) alkyl amino group in each of the alkyl radicals;

Alk ¹ is C 1 -C 5 alkanediyl; Alk ² is C 2 -C 15 alkanediyl;

Q is a radical of formula (aa) to (nn)

I R ”

K ”/ H-r '* \ -ρ« α / R ”<ss>.

N-i (bb). --- TpR ¹¹ ()).

N— ¹

I

R ”/ = <

(W). - (N / ^N )

R ”(clay).

R (hh).

N R @ + = 7-r @ (k).

(II).

(Mm).

NN _{—CrSj / m / r51} (m).

N ^ ^{, J} 7 '> _ ^ 7''- ₂ ),

R «K” where

R ²⁶ is hydrogen, cyano, aminocarbonyl or C 1 -C 6 alkyl;

R ( ²⁷⁾ is hydrogen, (C1-C6) alkyl, (C3-C6) alkenyl, (C3-C6) alkynyl, (C3-C6) cycloalkyl or (C1-C6) arylalkyl;

R ( ²⁸⁾ is hydrogen or (C1-C6) alkyl;

R ²⁷ and R ^{28 taken} together form a divalent radical of the formula - (CH 2 -) - or - (CH ₂ ) ₅ -, or a piperazine radical which is optionally substituted by C 1 -C 6 alkyl;

R29 R36 R40 R41 J ^ 42 R43 R44 R45

R ^{@ 46} , R ^{@ 53} , R @ ⁵⁴ and R @ ^{55 are} each independently hydrogen, hydroxy, halogen, C1 -C6 alkyl, C1 -C6 alkoxy, aryloxy, C1 -C6 arylalkyl; C1-C6alkylthio, cyano, amino, mono- or di (alkyl) amino of 1 to 6 carbon atoms in each of the alkyl radicals, mono- or di (cycloalkyl) amino of 3 to 6 carbon atoms in each of cycloalkyl radicals, aminocarbonyl, C 1 -C 6 alkoxycarbonylamino, C 1 -C 6 alkylaminocarbonylamino, piperidyl or pyrrolidinyl;

R ³² , R ³⁵ and R ⁵² each independently are hydrogen, C 1 -C 6 alkyl, C 1 -C 6 alkylcarbonyl or C 1 -C 6 arylalkyl; q is 1, 2 or 3;

R ³³ and R ³⁴ each independently represent a hydrogen atom or R ³³ and R ³⁴ together with the carbon atom to which they are attached represent a radical of formula C (O);

r is 1, 2 or 3;

R ⁴⁷ and R ⁴⁸ each independently represent a hydrogen atom or R ⁴⁷ and R ⁴⁸ together with the carbon atom to which they are attached represent a radical of formula C (O);

R ⁴⁹ is hydrogen, halogen or C 1 -C 6 alkyl;

R ⁵⁰ represents a hydrogen atom and

R ⁵¹ is hydroxy or

R ⁵⁰ and R ⁵ 'taken together are a bivalent radical of formula (CH ₂ ) ₃ or (CH ₂ ) ₄ , which is optionally substituted with C 1 -C 6 alkyl; and aryl is phenyl optionally substituted with hydroxy, halogen, C 1 -C 6 alkyl or C 1 -C 6 alkoxy;

wherein when R ⁴ represents a hydrogen atom and R ⁵ and R ⁶ represent R ^5c and R ⁶⁴ , then Q represents a radical of formula (gg); (Hh); (Ii); (Jj); (Kk); (11); (Mm); (Nn); a radical of formula (aa) wherein R ²⁷ is cycloalkyl of 3 to 6 carbon atoms or arylalkyl of 1 to 6 carbon atoms in the alkyl radical; a radical of formula (aa) wherein R ²⁷ and R ²⁸ together with the nitrogen atom to which they are attached form a piperazine ring which is optionally substituted with C 1-6 alkyl; a radical of formula (bb) wherein R ²⁹ represents a hydroxy group on a carbon atom adjacent to a nitrogen atom; a radical of formula (dd) wherein R ³⁵ is a hydrogen atom and R ³³ and R ³⁴ together with the carbon atom to which they are attached form a radical of formula C (O) or a radical of formula (ee) wherein R ⁵⁵ is arylalkyl of 1 to 6 carbon atoms in the alkyl radical;

and the pharmaceutically acceptable acid or base addition salts and stereochemically isomeric forms thereof.

Certain compounds of formula (I) may also exist in tautomeric forms. These forms are within the scope of the invention, although not explicitly indicated in the above formula.

The present invention also provides dihydrobenzopyran derivatives of formula (I) for use in medicine and pharmaceutical compositions based thereon.

The present invention further provides a process for the preparation of the dihydrobenzopyran derivatives of formula (I) as described in more detail below.

Finally, the invention also relates to intermediates for the production of dihydrobenzopyran derivatives of formula (I), the structure of which corresponds to formula (V-a)

wherein R ³ , R ^5a and R ^6a are as defined above and Alk ³ is C 1-4 alkanediyl, pharmaceutically acceptable addition salts thereof, or stereochemically isomeric forms thereof.

The following is a definition of some of the terms used in this specification. The term "halogen" refers to fluoro, chloro, bromo and iodo. The term "C 1 -C 6 alkyl" refers to a straight or branched chain saturated hydrocarbon radical having 1 to 6 carbon atoms such as methyl, ethyl, propyl, butyl, pentyl, hexyl and the like. The term "C 3 -C 6 alkenyl" refers to a straight or branched chain hydrocarbon radical containing one double bond and 3 to 6 carbon atoms, such as 2-propenyl, 3-butenyl, 2-butenyl, 2-pentenyl, 3-pentenyl, 3-methyl-2-butenyl, and the like, the carbon atom of the C3-6 alkenyl attached to the nitrogen atom is preferably saturated. "C 3 -C 6 alkynyl" means a straight or branched chain hydrocarbon radical containing one triple bond and 3 to 6 carbon atoms, such as 2-propionyl, 3-butynyl, 2-butynyl, 2-pentynyl, 3-pentinyl, 3-hexinyl and the like, wherein the carbon atom of the C 3 -C 6 alkynyl attached to the nitrogen atom is preferably saturated. The term "C 3 -C 6 cycloalkyl" refers to cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl. The term "C 1 -C 5 alkanediyl" refers to a straight or branched chain divalent saturated hydrocarbon radical having 1 to 5 carbon atoms, such as methylene, 1,2-ethanediyl, 1,3-propanediyl, 1,3-propanediyl; , 4-butanediyl or 1,5-pentanediyl and their branched isomers. The term "C 2 -C 15 alkanediyl" refers to a straight or branched chain divalent saturated hydrocarbon radical having 2 to 15 carbon atoms, such as 1,2-ethanediyl, 1,3-propanediyl, 1,4- butanediyl, 1,5-pentanediyl, 1,6-hexanediyl, 1,7-heptanediyl, 1,8-octanediyl, 1,9-nonanediyl, 1,10-decanediyl, 1,11-undecanediyl, 1,12-dodecanedi 1,13-tridecanediyl, 1,14-tetradecanediyl, 1,15-pentadecanediyl and their branched isomers. The terms "C 1 -C 4 alkanediyl", "C 2 -C 6 alkanediyl" and "C 2 -C 14 alkanediyl" are defined in an analogous manner. The designation "C (O)" is used for a carbonyl group.

Pharmaceutically acceptable acid addition salts include the therapeutically active non-toxic addition salts which the compounds of formula (I) are able to form. These salts can be readily obtained by treating the base form with an appropriate acid, such as an inorganic acid such as a hydrohalic acid such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid and phosphoric acid or an organic acid such as acetic acid, propionic acid, hydroxyacetic acid, 2-hydroxypropanoic acid, 2-oxopropanoic acid, ethanedioic acid, propanedioic acid, butanedioic acid, (Z) -2-butenedioic acid, (E) -2-butenedioic acid, 2-hydroxybutanedioic acid , 2,3-dihydroxybutanedioic acid, 2-hydroxy-1,2,3-propanetricarboxylic acid, methanesulfonic acid, ethanesulfonic acid, benzenesulfonic acid, 4-methylbenzenesulfonic acid, cyclohexanesulfamic acid, 2-hydroxybenzoic acid and 4-amino-2- 2- hydroxybenzoic. Conversely, the salt form can be converted by treatment with alkali into the free base.

Compounds of formula (I) containing acidic protons can be converted into therapeutically active non-toxic metal or amine addition salts by treatment with a suitable organic or inorganic base. Examples of suitable bases are ammonium salts, alkali metal salts and alkaline earth metal salts, e.g. j. lithium, sodium, potassium, magnesium and calcium salts with organic bases such as benzatin, N-methyl-D-glucamine, hydrabamine salts and salts with amino acids such as e.g. with arginine, lysine and the like. Conversely, the salt form can be converted by acid treatment to the free acid form.

Also included within the scope of the term salts are the hydrates and solvates which the compounds of formula (I) are able to form. Examples of such forms are: hydrates, alcoholates and the like.

The term "stereochemically isomeric forms" as used in the above definitions includes all possible isomeric forms that the compounds of formula (I) may take. Unless otherwise indicated or indicated, the chemical designation of compounds refers to a mixture of all possible stereochemically isomeric forms, such mixture comprising all diastereomers and enantiomers of the basic molecular structure. In particular, stereogenic centers have the R or S configuration, the substituents of the divalent cyclic saturated hydrocarbon radicals are either in the cis- or trans-configuration, and the C 3 -C 6 alkenyl radicals have the E- or Z-configuration. Of course, all stereochemically isomeric forms of the compounds of formula (I) are within the scope of this invention. R ¹ is preferably a methyl group or a hydrogen atom, preferably a hydrogen atom;

R ² is preferably methyl or H, preferably H;

R ³ is preferably a methyl group or a hydrogen atom, preferably a hydrogen atom;

R ⁴ is preferably a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, preferably a hydrogen atom;

where R ⁵ and R ⁶ are R ⁵ and R ^was, then R ^{5 a} and R ^{6 a} are preferably a bivalent radical of formula (al), (a2), (a3), (a4), (a7), (a8), (al 1) or (a12);

X is preferably an oxygen or sulfur atom, or a sulfonyl group, preferably an oxygen atom or a sulfonyl group;

Y is preferably an oxygen or sulfur atom, preferably an oxygen atom;

Z is preferably -O-C (O) - or -C (O) -O-;

where R ⁵ and R ⁶ is R ^sb and ^R6b, then ^R6b preferably is a hydroxyC 1-6 alkyloxy, trihalomethyl or a radical of formula (bl), (b2), (b3), (b4), (b5), (bo) and (b ^13);

R ^6b is preferably bonded at the 8-position of the dihydrobenzopyran residue;

R ⁸ is preferably hydrogen or C 1 -C 6 alkoxycarbonyl in the alkoxy radical, preferably hydrogen;

R ⁹ is preferably a hydrogen atom or a C 1 -C 6 alkoxycarbonyl group, preferably a hydrogen atom or a methoxycarbonyl group;

R ¹⁰ and R ¹¹ each independently represent a hydrogen atom or a C 1 -C 6 alkyl group, preferably a hydrogen atom or a methyl group;

R ¹² and R ¹³ each independently represent preferably hydrogen or hydroxy;

R ¹⁴ and R ¹⁵ each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, preferably a hydrogen atom;

R ¹⁶ and R ¹⁷ each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, preferably a hydrogen atom;

R ^8, R ^19, R ^20, R ^21, R ^22, R ^23, R ²⁴ and R ²⁵ is preferably H;

when R ⁵ and R ⁶ are R ⁵ 'and R ^6c , then R ^5c and R ⁶⁹ preferably represent a hydrogen atom, a halogen atom or a C 1-6 alkyl group, preferably a hydrogen, chlorine or fluorine atom, a methyl group or an ethyl group;

Alk ¹ is preferably C 1 -C 3 alkanediyl, preferably methylene;

Alk ² is preferably C 2 -C 6 alkanediyl, preferably 1,3-propanediyl;

when Q is a radical of formula (aa) then

R ²⁶ is preferably a hydrogen atom, a cyano group, an aminocarbonyl or a methyl group, preferably a hydrogen atom or a cyano group;

SK 282402 Β6

R ²⁷ is preferably a hydrogen atom or a C 1 -C 6 alkyl group, preferably a hydrogen atom, a methyl group or an ethyl group;

R ²⁸ is preferably hydrogen or alkyl of 1 to 6 carbon atoms, preferably hydrogen or methyl;

when Q is a radical of formula (bb), then R ²⁹ and R ³⁰ each independently represent preferably a hydrogen atom, a hydroxy group, a halogen atom or a methyl group, preferably R ²⁹ and R ³⁰ both represent hydrogen atoms or R ²⁹ represents a hydrogen atom and R ³⁰ represents OH;

when Q is a radical of formula (cc) then

R ³¹ is preferably a hydrogen atom or a hydroxy group, preferably a hydrogen atom;

R ³² is preferably a hydrogen atom or a phenylmethyl group, preferably a hydrogen atom;

when Q is a radical of formula (dd), then q is preferably 2;

R ³³ and R ³⁴ both preferably represent hydrogen atoms;

R ³⁵ preferably represents a hydrogen atom or a phenylmethyl group, preferably a hydrogen atom;

when Q is a radical of formula (ee) then

R ³⁶ is preferably a hydrogen atom, a halogen atom or a methyl group, preferably a hydrogen or chlorine atom;

R ⁵⁵ is preferably hydrogen or phenylmethyl;

when Q is a radical of formula (ff) then

R ³⁷ and R ³⁸ each independently represent preferably a hydrogen atom, a halogen atom or a methyl group, preferably a hydrogen atom or a chlorine atom;

when Q is a radical of formula (gg) then

R ³⁹ and R ⁴⁰ preferably each independently represent a hydrogen atom, a hydroxy group, a chlorine atom or a methyl group, preferably

R ³⁹ and R ⁴⁰ are both hydrogen or R ³⁹ is hydrogen and R ⁴⁰ is hydroxy; when Q is a radical of formula (hh) then

R ⁴¹ and R ⁴² each independently represent preferably hydrogen, hydroxy, halogen or methyl, preferably

R ( ⁴¹⁾ and R ( ⁴²⁾ are both hydrogen or R ( ⁴¹⁾ is hydrogen and R ( ⁴²⁾ is chlorine;

when Q is a radical of formula (ii) then

R ⁴³ and R ⁴⁴ each independently represent preferably hydrogen, halogen, C 1 -C 6 alkoxy, C 1 -C 6 alkylthio, amino, mono- or di (C 1 -C 6) amino in each of alkyl radicals, preferably R ⁴³ is hydrogen, chlorine, methylthio or amino, and R ⁴⁴ is hydrogen;

when Q is a radical of formula (jj) then

R ⁴⁵ and R ⁴⁶ each independently represent preferably a hydrogen atom, a halogen atom or a C 1 -C 6 alkyl group, preferably a hydrogen or chlorine atom;

when Q is a radical of formula (kk), then r is preferably 2a

R ⁴⁷ and R ⁴⁸ are both preferably hydrogen;

when Q is a radical of formula (11), then

R ⁴⁹ is preferably a hydrogen atom or a methyl group, preferably a hydrogen atom;

when Q is a radical of formula (mm) then

Preferably R ³⁰ and R ³¹ together represent a bivalent radical of formula (CH ₂ ) ₄ a

R ³² preferably represents a hydrogen atom;

when Q is a radical of formula (nn) then

R ^{@ 33 is} preferably hydrogen, R ^{@ 34 is} preferably hydroxy and aryl is preferably phenyl.

Particular preference is given to a group of compounds of formula (I) wherein R ¹ , R ² , R ³ and R ⁴ are as defined in formula (I) and R ³ and R ⁶ have the meanings of R ^3a and R ^6a where of formulas (a7) and (a8) t is 2; Q is a radical of formula (aa), (bb), (cc) or (dd), wherein q is 1 or 2, a radical of formula (ee) wherein R ³³ is hydrogen, a radical of formula (ff), (gg) , (hh), (ii), (jj) or (kk), wherein q is 1 or 2, or the remainder of formula (11).

Another group of compounds of formula (I) that are particularly preferred are compounds of formula (I) wherein R ¹ , R ² and R ³ are as defined in formula (I); R ⁴ is hydrogen or halogen, or C 1 -C 6 alkyl; R ⁵ and R ⁶ have the meaning of R ^3b and R ^6b , wherein R ^3b is hydrogen and R ^6b is hydroxyalkyl of 1 to 6 carbon atoms, carboxyalkyl of 1 to 6 carbon atoms in the alkyl residue, alkoxycarbonylalkyl of 1 to 6 carbon atoms in alkoxy and 1 to 6 carbon atoms in the alkyl radical or trihalomethyl, the radical of formula (b1), (b2), (b3), (b4), (b5), (b5), (b7), (b8), (b9) , (b10), (b11) or (b12); Q is a radical of formula (aa), (bb), (cc) or (dd), wherein q is 1 or 2, a radical of formula (ee) wherein R ³³ is hydrogen, a radical of formula (ff), (gg) , (hh), (ii), (jj) or (kk), wherein q is 1 or 2, or the remainder of formula (11).

Yet another group of compounds of formula (I) that are particularly preferred are compounds of formula (I) wherein R ¹ , R ² and R ³ are as defined in formula (I); R ⁴ represents a hydrogen atom; R ⁵ and R ⁶ have the meaning of R ^3c and R ⁶⁹ ; Q is a radical of formula (gg); (Hh); (Ii); (jj) or (kk) wherein q is 1 or 2; (11); a radical of formula (bb) wherein R ²⁹ represents a hydroxy group on a carbon atom adjacent to a nitrogen atom; or a radical of formula (dd) wherein R ³⁵ represents a hydrogen atom, R ³³ and R ³⁴ together with the carbon atom to which they are attached form a group of formula C (O) and q represents 1 or 2.

Of interest are those compounds of formula (I), wherein R ² is hydrogen.

Also of interest are compounds of formula (I) wherein R ³ is hydrogen.

Particularly preferred are those compounds of formula (I) wherein R ³ and R ⁶ are R ^3a and R ^6a and Q is the radical of formula (bb) wherein R ²⁹ and R ³⁰ are hydrogen atoms; or

Q is a radical of formula (dd) wherein q is 1 or 2 and R ³¹ and R ^{32 are} both hydrogen.

Particularly preferred are also those compounds of formula (I) wherein R ³ and R ⁶ are R ^3b and R ^6b , wherein R ^3b is hydrogen and R ^6b is C 1 -C 6 alkoxycarbonyl and C 1 -C 6 alkoxy in alkyl radical, trihalomethyl5, C1 -C6 alkoxycarbonylalkylthio, C1 -C6 alkoxy, C1 -C6 alkylthio, arylthio or arylsulfinyl, or ^R6b represents a radical of formula (b1), ⁸ represents a hydrogen atom; (b2) wherein R ⁹ is C 1 -C 6 alkoxycarbonyl; (b3) wherein R ¹⁰ and R ^{11 are} both hydrogen atoms; (b4) wherein R ¹² and R ^{13 are} both hydrogen atoms; (b5) wherein R ¹⁴ and R ^{15 are} both hydrogen atoms; (b6), wherein R ¹⁶ is H or halogen and R ¹⁷ is H; or (b13) wherein R ²⁵ represents a hydrogen atom; Q is a radical of formula (bb) wherein R ²⁹ and R ³⁰ are hydrogen; or Q is a radical of formula (dd), wherein q is 1 or 2 and R ³¹ and R ^{32 are} both hydrogen.

Still other particularly preferred compounds are those compounds of formula (I) wherein R ⁴ is hydrogen; R ⁵ and R ⁶ are R ^5c and R ^6c , wherein R ^5c is hydrogen and R ^6c is hydrogen, halogen, C 1 -C 6 alkyl or C 1 -C 6 alkoxy; Q is a radical of formula (aa) wherein R ²⁶ is hydrogen, cyano or aminocarbonyl, R ²⁷ is arylalkyl of 1 to 6 carbon atoms in the alkyl radical, and R ²⁸ is hydrogen or C 1-6 alkyl or R ²⁷ and R ²⁸ together with the nitrogen atom to which they are attached form a piperazine ring, which is N-substituted with C 1-6 alkyl; a radical of formula (bb) wherein R ²⁹ represents a hydroxy group on a carbon atom adjacent to a nitrogen atom; residue (dd), wherein R ³⁵ represents a hydrogen atom and R ³³ and R ³⁴ together with the carbon atom to which they are attached form C (O); a radical of formula (ee) wherein R ³⁶ is hydroxy and R ⁵⁵ is arylalkyl of 1 to 6 carbon atoms in the alkyl radical; a radical of formula (gg) wherein R ³⁹ and R ⁴⁰ each independently are hydrogen, C 1 -C 6 alkyl or aminocarbonyl; a radical of formula (hh) wherein R ⁴¹ and R ^{42 are} each independently hydrogen, halogen, hydroxy, C 1 -C 6 alkyl or aminocarbonyl; the radical of formula (ii) wherein R ⁴⁴ is hydrogen and R ⁴³ is hydrogen, C 1 -C 6 alkoxy, C 1 -C 6 alkylthio, amino, mono- or di (C 1 -C 6) alkyl (amino) carbon in each of the alkyl radicals or piperidyl; a radical of formula (jj) wherein R ⁴⁵ and R ⁴⁶ both represent hydrogen atoms; a radical of formula (kk) wherein R ⁴⁷ and R ^{48 are} both hydrogen atoms; a radical of formula (11) wherein R ⁴⁹ is hydrogen; a radical of formula (mm) wherein R ⁵⁰ represents a hydrogen atom, R ⁵¹ represents a hydroxy group or R ³⁰ and R ⁵¹ together form a bivalent radical of formula (CH ₂ ) ₄ and R ⁵² represents a hydrogen atom; or a radical of formula (nn) wherein R ⁵³ is hydrogen and R ⁵⁴ is hydroxy.

Particularly preferred compounds include: N - [(2,3,4,7,8,9-hexahydrobenzo [2,1b: 3,4-b '] dipyran-2-yl) methyl-N'-2- pyrimidinyl-1,3-propanediamine;

N - [(2,3,4,7,8,9-hexahydro-cyclopenta [h] -l-benzopyran-2-yl) methyl] -N'-2-pyrimidinyl-l, 3-propanediamine;

(±) N - [(2,3,4,8,9,10-hexahydro [2-b: 3,4-b '] dipyran-2-yl) methyl] -N'-2-pyrimidinyl-L , 3-propanediamine;

N - [(3,4,7,8,9,10-hexahydro-2H-naphtho [l, 2-b] pyran-2-yl) methyl] -N'-2-pyrimidinyl-l, 3-propanediamine;

N- (4,5-dihydro-1H-imidazol-2-yl) -N '- [(2,3,4,7,8,9-hexahydrocyclopentafh] -1-benzopyran-2-ylmethyl] -1,3 propanediamine;

N - [(2,3,4,7,8,9-hexahydro [2-b: 3,4-b '] dipyran-2-yl) methyl] -N' - (l, 4,5,6- tetrahydro-2-pyrimidinyl) -l, 3-propanediamine;

N - [(2,3,4,7,8,9-hexahydrocyk1openta [h] -l-benzopyran-2-yl) methyl] -N '- (l, 4,5,6-tetrahydro-2-pyrimidinyl) -l, 3-propanediamine;

N - [(2,3,7,8-tetrahydro-9H-pyrano [2,3-f] -1,4-benzodioxin-9-yl) methyl] -N '- (1,4,5,6- tetrahydro-2-pyrimidinyl) -1,3-propanediamine;

N - [(3,4,7,8,9,10-hexahydro-2H-naphtho [l, 2-b] pyran-2-yl) methyl] -N '- (l, 4,5,6-tetrahydro- 2-pyrimidinyl) -l, 3-propanediamine; methyl 3- [6-fluoro-3,4-dihydro-2 - [[[3- (2-pyrimidinyl) propyl] amino] methyl] -2H-l-benzopyran-8-yl] -2-propenoate; N - [[6-fluoro-8- (2-furyl) -3,4-dihydro-2H-1-benzopyran-2-yl] methyl] -N'-2-pyrimidinyl-1,3-propanediamine;

N - [[6-fluoro-3,4-dihydro-8- (2-thienyl) -2H-1-benzopyran-2-yl] methyl] -N '- (1,4,5,6-tetrahydro-2) pyrimidinyl) -1,3-propanediamine;

N - [(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] -N '- (3,4,5,6-tetrahydro-2-pyridyl) -1,3-propanediamine and

N ⁴ - [3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] amino] propyl] -N ^2- methyl-2,4-pyrimidinediamine and their pharmaceutically acceptable addition salts with acids and stereochemically isomeric forms.

Compounds of formula (I) may generally be prepared by reacting a diamine of formula (II) with a reagent of formula (III) wherein W ¹ represents a reactive leaving group such as halogen, for example chlorine or bromine; alkoxy such as methoxy, ethoxy, and the like; aryloxy, for example phenoxy and the like; alkylthio such as methylthio, ethylthio and the like; arylthio such as benzenethio and the like.

In the general formulas (II), (III) and in all the following formulas, R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , Alk ¹ , Alk ² and Q have the meanings given in formula (I) unless otherwise explicitly stated.

This reaction may be carried out by mixing the diamine of formula (II) with a reagent of formula (III) in a suitable solvent such as an alcohol such as ethanol and the like; a halogenated hydrocarbon such as trichloromethane and the like. or an ether such as tetrahydrofuran, 1,4-dioxane and the like; an aromatic hydrocarbon such as methylbenzene and the like, or a mixture of these solvents. Optionally, a base such as an alkali metal carbonate such as sodium or potassium carbonate may be added to the reaction mixture; an alkali metal hydrogencarbonate, for example sodium or potassium hydrogencarbonate, or a suitable organic base, for example Ν, Ν-diethylethanamine, pyridine and the like, to capture the acid that may be formed during the reaction. The reaction rate can be encouraged by elevated temperatures. Preferably, the reaction is carried out at the reflux temperature of the reaction mixture.

Compounds of formula (I) may also generally be prepared by reductive N-alkylation of an amino derivative of formula (VI) with a suitable aldehyde of general formula (6).

Formula (V) wherein Alk ³ is a direct bond or an alkanediyl group having 1 to 4 carbon atoms.

This reaction is carried out by mixing the reactants in a suitable solvent such as an alcohol such as ethanol and the like; an ether such as tetrahydrofuran and the like; an aromatic solvent such as methylbenzene and the like, or mixtures thereof. Alternatively, a water separator may be used to remove the water formed during the reaction. The resulting imine can then be reduced by treatment with a reactive hydride such as sodium borohydride, or by catalytic hydrogenation on a suitable catalyst such as palladium on carbon, platinum on carbon, Raney nickel, and the like. in a suitable solvent such as an alcohol such as methanol, ethanol and the like; an ether such as tetrahydrofuran and the like; a carboxylic acid ester such as ethyl acetate, butyl acetate and the like; or a carboxylic acid such as acetic acid, propionic acid and the like. The reaction may optionally be carried out at elevated temperatures and / or pressures.

The intermediate aldehyde of formula (V) may be formed by reducing the acyl derivative of formula (IV), wherein Alk ³ is as defined above. The acyl halide can be prepared by reacting the corresponding acid with a halogenating agent such as thionyl chloride, phosphorus trichloride, phosphorus tribromide, oxalyl chloride and the like. The latter reaction can be carried out in an excess of a halogenating agent or in suitable solvents such as halogenated hydrocarbons such as dichloromethane, trichloromethane and the like; aromatic hydrocarbons such as methylbenzene and the like; ethers such as tetrahydrofuran, 1,4-dioxane and the like. or dipolar aprotic solvents such as N, N-dimethylformamide, Ν, Ν-dimethylacetamide and the like. The reaction rate can be encouraged by stirring and elevated temperatures.

This reduction of the acyl halide of formula (IV) can, for example, be carried out by catalytic hydrogenation using a catalyst such as palladium on carbon, palladium on barium sulfate, platinum on carbon and the like. in a suitable solvent such as an ether such as tetrahydrofuran and the like, preferably with admixture of a dipolar aprotic solvent such as N, N-dimethylformamide, Ν, Ν-dimethylacetamide and the like. Optionally, a catalytic poison such as thiophene, quinoline-sulfur complex and the like can be added.

The reaction sequence starting from the intermediate aldehyde of formula (IV) and leading to the compounds of formula (I) may be carried out in situ in a single reaction vessel.

Intermediates of formula (V) wherein R ⁵ and R ⁶ are R ⁵ 'and R ^6a are defined as intermediates of formula (Va), intermediates of formula (V) wherein R ⁵ and R ⁶ are R ^3b and R ^6b are defined as intermediates of formula (Vb). Intermediates of formula (Va) and (Vb) are considered novel.

Compounds of formula (I) may also be prepared by reductive N-alkylation of an amine of formula (IX) with an aldehyde of formula (X) wherein Alk ⁴ is C 2 -C 14 alkanediyl. The reaction conditions in this case are similar to those of the reaction of intermediates of formula (V) with intermediates of formula (VI).

(IX) M

Intermediates of formula (IX) wherein R ⁵ and R ⁶ are R ^5a and R ^6a are hereinafter referred to as intermediates IX-a, and intermediates of formula (IX) wherein R ³ and R ⁶ are R ^5b and R ⁶⁵ are hereafter referred to as intermediates IX-b. The intermediates of formulas (IX-a) and (IX-b) are considered novel.

Compounds of formula (I) may also be prepared by N-alkylating an amine of formula (VI) with an intermediate of formula (VII) wherein W ² represents a reactive leaving group such as halogen, for example chlorine, bromine or iodine; sulfonyloxy, for example methanesulfonyloxy, methylbenzenesulfonyloxy and the like. in a suitable solvent such as a ketone, for example 2-butanone and the like; an ether such as tetrahydrofuran and the like; an aromatic hydrocarbon such as methylbenzene and the like; a dipolar aprotic solvent such as N, N-dimethylformamide, Ν, Ν-dimethylacetamide, dimethylsulfoxide and the like.

The reaction rate can be encouraged by stirring and heating. Optionally, a suitable base such as an alkali metal carbonate such as sodium carbonate or potassium carbonate is added to capture the acid that may have formed during the reaction; an alkali metal hydrogencarbonate such as sodium hydrogencarbonate or potassium hydrogencarbonate; a suitable organic base such as Ν, Ν-diethylethanamine, pyridine and the like.

Intermediates of formula (VII) wherein R ⁵ and R ⁶ are R ^5a and R ^6a are hereinafter referred to as intermediates VIII-a, and intermediates of formula (VII) wherein R ³ and R ⁶ are R ³¹³ and R ^6b are hereafter referred to as intermediates VIII-b. The intermediates of formulas (VII-a) and (VIII-b) are considered novel.

Compounds of formula (I) wherein R ² is hydrogen, which are represented by formula (I '), can be prepared by debenzylation of an intermediate of formula (VIII)

This debenzylation can be carried out by known methods such as catalytic hydrogenation using suitable catalysts, for example platinum on charcoal or palladium on charcoal, in a suitable solvent such as alcohols, for example methanol, ethanol, 2-propanol and the like; ethers such as 1,1'-oxybisethane, tetrahydrofuran, 2,2-oxybispropane and the like. Alternatively, elevated temperature and pressure may be employed.

Compounds of formula (I) wherein R ³ and R ⁶ are R ^3b and R ^6b are referred to as compounds of formula (Ib). Compounds of formula (Ib) may be prepared by aromatic substitution of a halogen substituent, preferably iodine, of a dihydrobenzopyran derivative of formula (XI). This aromatic substitution may be carried out, for example, using a reagent of formula (XII) in a suitable solvent in the presence of a suitable catalyst such as tetrakis (triphenylphosphine) palladium.

(C ,. _{alkyl) 3} Sn-R "

The compounds of formula (I) may also be converted into each other using functional group transformations. For example, compounds of formula (I) wherein the group of formula (Q) is a pyrimidinyl or pyridyl radical can be converted to tetrahydroanalogues by well-known catalytic hydrogenation techniques. Further, compounds of formula (I) bearing a (C 3 -C 6) alkynyl or (C 3 -C 6) alkenyl group can be converted to compounds having a (C 1 -C 6) alkyl group using well known hydrogenation procedures. Compounds of formula (I) bearing a cyano group can also be converted to the corresponding aminomethyl-containing compounds using known hydrogenation procedures. Compounds containing an alkoxy substituent can be converted to compounds containing a hydroxy group by treating the alkoxy compound with a suitable acidic reagent such as hydrohalic acid, e.g., hydrobromic acid or boron tribromide, and the like. Compounds bearing an amino substituent may be N-acylated or N-alkylated using known N-acylation or N-alkylation procedures.

Said intermediates are novel and can be prepared by methods known in the art as illustrated in the Examples.

Pure stereochemically isomeric forms of the compounds of this invention may be obtained by methods known in the art. Diastereoisomers may be separated by physical separation techniques, such as selective crystallization and chromatographic techniques, for example liquid chromatography. The enantiomers may be separated by selective crystallization of their diastereomeric salts with optically active acids. Pure stereochemically isomeric forms may also be obtained from the corresponding pure stereochemically isomeric forms of the appropriate starting materials, provided that the reaction occurs stereospecifically. When a specific stereoisomer is desired, the desired compound is preferably produced by synthesis using stereospecific methods of preparation. Enantiomerically pure starting materials are preferably used in these processes.

The compounds of formula (I), their pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof have interesting pharmacological properties. They have agonist activity on the so-called. _R 5HT like (similar to those of receptors, 5HT _receptors,). The compounds of the invention have potent and selective vasoconstrictor activity. They are useful in the treatment of diseases related to vasodilation. For example, they are useful in the treatment of diseases and conditions that are characteristic of or associated with brain pain, such as migraine, kick headache (histamine cefalalgia), and headache associated with vascular disorders. These compounds are also useful in the treatment of venous insufficiency and in the treatment of diseases associated with hypotension.

The vasoconstrictor activity of the compounds of formula (I) can be determined using an in vitro assay: "Instantaneous Changes of Alpha - Adrenoreceptor Affinity Caused by Moderate Cooling in Canine Cutaneous Veins", American Joumal of Physiology 234 (4), H ₃₃ 0-Hi ₃₇ , 1978; or an assay as described in the pharmacological example, in which a serotonin-like response of the compounds of the invention is tested in pig basilar arteries.

In view of their useful pharmacological properties, the compounds of this invention may be formulated into various pharmaceutical formulations suitable for administration to patients. In the manufacture of these pharmaceutical compositions of the invention, an effective amount of a specific compound in the form of a base or acid addition salt as the active ingredient is converted into a homogeneous mixture with a pharmaceutically acceptable carrier. The carrier may take a variety of forms, depending on the type of formulation desired for administration. The pharmaceutical preparations are conveniently in unit dosage forms, for example, for oral, rectal, percutaneous or parenteral injection. For example, any of the usual pharmaceutical media such as water, glycols, oils, alcohols and the like may be used in the preparation of oral dosage forms, for oral liquid preparations such as suspensions, syrups, elixirs and solutions; or solid carriers such as starches, sugars, kaolin, lubricants, binders, disintegrating agents and the like in the case of powders, pills, capsules or tablets. Because of their ease of administration, tablets and capsules represent the most advantageous oral unit dosage form and, of course, solid pharmaceutical carriers are employed in their manufacture. In the case of parenteral formulations, the carrier will usually comprise sterile water, at least as the main ingredient, but other ingredients may also be present, for example to aid in dissolution. Injectable solutions, for example, may be prepared in which the carrier comprises sodium chloride solution, glucose solution or a mixture of both. Injectable suspensions may also be prepared in which case appropriate liquid carriers, suspending agents and the like may be employed. In formulations suitable for percutaneous administration, the carrier optionally comprises a penetration enhancing agent and / or a suitable wetting agent, optionally in admixture with minor amounts of suitable ingredients of any type, provided that the ingredients do not cause substantial skin damage. These additives may facilitate the administration to the skin and / or may facilitate the manufacture of the desired compositions. These preparations may be administered in a variety of ways, such as in the form of transdermal patches, patches, or ointments. It is particularly advantageous to prepare said pharmaceutical compositions in unit dosage form since this will facilitate dosing and more uniform dosages can be achieved. The unit dosage form as used in this specification and claims means physically discrete units suitable as unitary dosages, each containing a predetermined quantity of active ingredient calculated to produce the desired therapeutic effect and, in addition to this comprises the desired pharmaceutical carrier. Examples of such unit dosage forms include tablets (including scored and coated tablets), capsules, pills, powders, cachets, injectable solutions or suspensions, teaspoons, tablespoons, and the like. and their separate multiples.

The compounds of the invention may therefore be used as medicaments in the treatment of diseases associated with vasodilation, in particular hypotension, venous insufficiency, and in particular cerebral pain, including migraine. The compounds of the invention are also useful in a method of treating warm-blooded animals suffering from diseases associated with vasodilation, such as hypotension, venous insufficiency, and in particular cerebral pain, including migraine, comprising administering to a patient an effective amount of a compound of formula (I). ), pharmaceutically acceptable acid addition salts or stereoisomeric forms thereof. Those skilled in the art are able to readily determine this effective amount based on the test results below. In general, dosages in the range of from 1 pg / kg to 1 mg / kg body weight and in particular from 2 pg / kg to 200 pg / kg body weight apply. It may be appropriate to administer the desired dose in the form of two, three, four or more sub-doses at appropriate intervals during dfta. These sub-doses may be formulated in unit dosage forms, in which case a unit dosage form may contain, for example, 0.005 to 20 mg, and in particular 0.1 to 10 mg of active ingredient.

The invention is illustrated by the following examples. These examples are illustrative only and do not limit the scope of the invention in any way.

DETAILED DESCRIPTION OF THE INVENTION

A. Production of compounds of formula (I) wherein R ⁵ and R ⁶ represent R ⁵ 'and R ^6a and intermediates therefor

Example 1-a

a) A mixture of 2,3-dihydro-1H-inden-4-ol (0.37 mol) in acetic anhydride (0.37 mol) in sulfuric acid (300 ml) was stirred at room temperature for 1 hour. The reaction mixture was poured into a mixture of water and 1,1'-oxybisethane. The organic layer was separated, dried over magnesium sulfate, filtered, and the solvent was evaporated under reduced pressure. 75 g (over 100% of the crude product) of 2,3-dihydro-1H-inden-4-ol acetate (ester) (intermediate 1-a) are obtained.

b) Intermediate (1-a) (0.37 mol) was heated to 100 ° C and aluminum chloride (200 g) was added. The reaction mixture was stirred at 120 ° C for 1 hour, cooled and ice was added followed by a mixture of water and concentrated hydrochloric acid. The resulting mixture was extracted with 1,1'-oxybisethane. The organic layer was separated, washed with charcoal, dried (MgSO4), filtered and evaporated. The residue was purified by distillation (oil pump; 110 ° C). 29 g of 1- (2,3-dihydro-4-hydroxy-1H-inden-5-yl) ethanone (intermediate 2-a) are obtained.

c) Sodium methoxide (24 g) was stirred in methylbenzene (300 mL). Diethyl oxalate (0.16 mol) and intermediate (2-a) (0.16 mol) in methylbenzene (10 ml) were added dropwise. The resulting mixture was refluxed for 2 hours with stirring. The resulting precipitate was filtered off and dried. The solid obtained was stirred in a mixture of hydrochloric acid (10 ml) and acetic acid (500 ml). The reaction mixture was stirred and refluxed for 1 hour and poured into water. The resulting precipitate was filtered off and dried in vacuo. 21 g of 4,7,8,9-tetrahydro-4-oxocyclopenta [h] -1-benzopyran-2-carboxylic acid (intermediate 3-a) are obtained.

d) A mixture of intermediate (3-a) (0.09 mol) in acetic acid (200 ml) was hydrogenated in the presence of palladium on charcoal (1 g) as a catalyst. After uptake of 3 equivalents of hydrogen, the catalyst was filtered off and the solvent was evaporated. The residue was dried to give 21 g of (±) -2,3,4,7,8,9-hexahydrocyclopenta [h] -1-benzopyran-2-carboxylic acid (intermediate 4-a).

e) A mixture of intermediate (4-a) (0.11 mol) in tetrahydrofuran (250 ml) was stirred under a stream of nitrogen and 1,1'-carbonylbis-1H-imidazole (0.11 mol) was added. The reaction mixture was stirred at room temperature for 2 hours, then cooled to -80 ° C, a solution of diisobutylaluminum hydride in methylbenzene (20%, 0.33 mol) was added dropwise, and the reaction mixture was stirred at -80 ° C for 2 hours. . The mixture was quenched with methanol and poured into water. The resulting mixture was acidified and extracted with 1,1'-oxybisethane. The separated organic layer was dried over magnesium sulfate, filtered, and the solvent was evaporated. 12 g of (±) -2,3,4,7,8,9-hexahydrocyclopenta [h] -1-benzopyran-2-carboxaldehyde are obtained (intermediate 5-a).

Similar processes also produce: (±) -2,3,7,8-tetrahydro-9H-pyrano [2,3-f] -1,4-benzodioxine-9-carboxaldehyde (interm. 6-a);

(±) -2,3,4,8,9,10-hexahydrobenzo [1,2-b: 3,4-b '] dipyrane-2-carboxaldehyde (intermediate 7-a) and (±) -2, 3,4,7,8,9-hexahydrobenzo [2,1b: 3,4-b '] dipyrane-2-carboxaldehyde (interm. 8-a).

Example 2-a

a) A mixture of 4-oxo-4H-naphtho [1,2-b] pyran-2-carboxylic acid (12 g) and 2-methoxyethanol (100 mL) is hydrogenated under normal pressure at room temperature in the presence of 10% palladium on active coal (2 g) as a catalyst. After uptake of the calculated amount of hydrogen, the catalyst was filtered off and the filtrate was evaporated. 7 g (61.4%) of 3,4-dihydro-2H-naphtho [1,2-b] pyran-2-carboxylic acid (intermediate 9-a) are obtained.

b) A mixture of intermediate 9-a (7 g), ethanol (160 ml) and sulfuric acid was stirred and refluxed for 1 hour. The reaction mixture was evaporated and the oily residue was taken up in water and treated with sodium hydroxide. The product was extracted with dichloromethane. The extract was dried, filtered and the filtrate was evaporated. 5 g (63.5%) of ethyl 3,4-dihydro-2H-naphtho [1,2-b] pyran-2-carboxylate (interm. 10-a) are obtained.

c) A mixture of intermediate (10-a) (0.03 mol) in methanol saturated with ammonia (200 ml) was stirred overnight at room temperature. The resulting precipitate was filtered off and washed with methanol. 6.6 g (97%) of (±) -3,4-dihydro-2H-naphtho [1,2-b] pyran-2-carboxamide (interm. 11-a) are obtained. The product obtained is used without further purification.

d) A mixture of intermediate (11-a) (0.0291 mol) and sodium borohydride (0.1455 mol) in 1,4-dioxane (50 ml) was cooled to 0 ° C under a nitrogen atmosphere. Acetic acid (0.1455 mol) in 1,4-dioxane (20 ml) was added dropwise. The mixture was stirred and refluxed for 30 minutes, then evaporated to dryness. Water was added to the residue and the aqueous mixture was acidified with concentrated hydrochloric acid and stirred for 30 minutes. The resulting mixture was basified with 50% sodium hydroxide solution and extracted with dichloromethane. The organic layer was dried, filtered and evaporated to dryness. The residue is converted into the hydrochloric acid salt and then the base is liberated. The residue (2.9 g) was purified by column chromatography on silica gel using dichloromethane / methanol (9.75: 0.25) as eluent. The pure fractions were collected and evaporated. 2.4 g (39%) of (±) -3,4-dihydro-2H-naphtho [1,2-b] pyran-2-methanamine (interm. 12-a) are obtained.

In a similar manner, (±) -3,4,7,8,9,10-hexahydro-2H-naphtho [1,2-b] pyran-2-methanamine (intermediate 13-a) was prepared.

Example 3-a

A mixture of intermediate (5-a) (0.03 mol) and benzenemethanamine (0.073 mol) in 2,2'-oxybispropane (250 ml) and N, N-dimethylacetamide (10 ml) was hydrogenated in the presence of 10% palladium on charcoal (1 g) as a catalyst. After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was stirred in a mixture of water and 1,1'-oxybisethane. The organic layer was separated, dried (MgSO 4), filtered and the solvent was evaporated. It will be obtained

SK 282402 Β6

6.5 g of (±) -2,3,4,7,8,9-hexahydro-N- (phenylmethyl) cyclopenta [h] -1-benzopyran-2-methanamine (interm. 14-a).

Example 4-a

A mixture of intermediate (14-a) (0.02 mol) and 2-propenenitrile (0.2 mol) in ethanol (100 ml) was refluxed overnight, then the solvent was evaporated. The residue was dissolved in methanol. Palladium on charcoal (10%, 2 g) was added and the mixture was hydrogenated. After uptake of 3 equivalents of hydrogen, the catalyst was filtered off and the filtrate was evaporated. 5.2 g of (±) - N - [(2,3,4,7,8,9-hexahydrocyclopenta [h] -1-benzopyran-2-yl) methyl] -1,3-propanediamine are obtained (intermediate 15). -a).

Example 5-a

A solution of ethyl 6-oxo-2,3-dimethyl-6H-furo [3,2-h] [1] benzopyran-8-carboxylate (0.1 mol) in methanol (250 mL) was hydrogenated at 170 ° C for 10 hours C (at elevated pressure) using palladium on charcoal containing 5% palladium (2 g) as a catalyst in the presence of a 4% thiophene solution (10 mL). After uptake of 3 equivalents of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by flash chromatography on silica gel using dichloromethane as eluent. The desired fractions were collected and the solvent was evaporated. 20 g (72.9%) of (±) -ethyl-7,8-dihydro-2,3-dimethyl-6H-furo [3,2-h] [1] benzopyran-8-carboxylate (intermediate 16-) were obtained. a).

Example 6-a

A mixture of intermediate (8-a) (6.9 g of impure solid) and N-2-pyrimidinyl-1,2-propanediamine (0.02 mol) in methanol (200 ml) was hydrogenated using palladium on charcoal (10 g). %, 2 g) as a catalyst and in the presence of a solution of thiophene (4%, 1 mL). After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by column chromatography on silica gel eluting with dichloromethane / methanol (95: 5 ammonia). The pure fractions were collected and the solvent was evaporated. The residue was dissolved in 2-propanone and converted to the ethanedioate salt (1: 2). The salt was filtered and dried under vacuum at 60 ° C. 7.8 g (73.0%) of (±) -N - [(2,3,4,7,8,9-hexahydrobenzo [2,1b: 3,4-b '] dipyran-2-yl) are obtained. (methyl)] - N'-2-pyrimidinyl-1,3-propanediamine ethanedioate (1: 2), m.p. 190.4 ° C (compound 1-a).

Example 7-a

A mixture of intermediate (13-a) (0.0088 mol) and 3- (2-pyrimidinylamino) propanal (0.0112 mol) in methanol (100 ml) was hydrogenated in a pan hydrogenator in the presence of palladium on charcoal (10%, 1 g) as a catalyst at room temperature and a pressure of 0.3 MPa. After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated to dryness. The residue was purified by column chromatography on silica gel eluting with dichloromethane / methanol (97: 3) as the eluent. Almost pure fractions were collected and evaporated. The residue was purified by high pressure liquid chromatography on silica gel eluting with dichloromethane: methanol (95: 5). The pure fractions were collected and evaporated. 0.85 g (27%) of (±) - N - [(3,4,7,8,9,10-hexahydro-2H-naphthofLZ-b] pyran-1'-yl] methyl] -N'-Z-pyrimidinyl-1 H-2-ol was obtained. -propanediamine, m.p. 57.6 ° C (compound 5-a).

Example 8-a

Intermediate 16-a (0.072 mol) was dissolved in methylbenzene (250 ml) / H (100 ml). The solution was cooled to -70 ° C and a solution of diisobutylaluminium hydride (1.5 M solution in hexane, 0.1 mol, 15 mL) was added dropwise and the mixture was stirred at -70 ° C for 1 hour. 15 ml of methanol are then added dropwise and the reaction mixture is allowed to warm to room temperature, poured into water, acidified with hydrochloric acid and extracted with diethyl ether. The separated organic layer was dried, filtered and the solvent was evaporated. The residue was dissolved in methanol (150 mL) and Ν-2-pyrimidinyl-1,3-propanediamine (0.06 mol) was added to the solution. The resulting mixture was hydrogenated using a small amount of palladium on charcoal as a catalyst and in the presence of a 4% thiophene solution (10 mL). After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by column chromatography on silica gel (dichloromethane / methanol 90/10). Three groups of fractions were collected and the solvent was evaporated. Residues (1), (2) and (3) (12 g) were obtained. A sample of residue (3) (3.6 g) was dissolved in 2-propanone and converted to the ethanedioic acid salt (1: 2) by treatment with ethanedioic acid solution. H ₂ O (0.020 mol) in 2-propanone. The resulting precipitate was filtered off and dried. 4.5 g (46.1%) of (±) - N - [(7,8-dihydro-2,3-dimethyl-6H-furo [3,2-h] [1] benzopyran-8-yl) are obtained. Methyl] -N'-2-pyrimidinyl-1,3-propanediaminethanedioate (1: 2), m.p. 208.8 ° C (compound 7-a).

The residue (2) was purified again by column chromatography on silica gel, eluting with dichloromethane: methanol (85: 15). The desired fractions were collected and the solvent was evaporated. The residue (1.8 g) was dissolved in ethanol and converted into ethanedioic acid salt (1: 2) by treatment with ethanedioic acid (0.010 ml). The resulting precipitate was filtered off and dried. 1.1 g (3.3%) of (±) -N-2-pyrimidinyl-N '- [(3,6,7,8-tetrahydro-2,3-dimethyl-2H-furo [3,2]) are obtained. -h] [1] benzopyran-8-yl) methyl] -1,3-propanediaminethanedioate (1: 2), m.p. 171.2 ° C (compound 8-a).

The following compounds were produced:

Table 2-a

uu

Zl. no. pr. no. R ⁵ , R ⁶ Physical data 1-a 6-a -CH ₂ -CH ₂ -CH ₂ -O- 11.190.4 ° C). 2 (0001¾ 2-a 6-a -ch ₂ -ch ₂ -ch ₂ - mp 1182 ° C / .2HCl. 1/2 H ₂ O 3-a 6-a -o-ch ₂ -ch ₂ -o- 11,199,032 / .2 (0301¾ 4-a 6-a -o-ch ₂ -ch ₂ -ch ₂ - m.p.197,6 32 / .2 (000 (¾. H2O 5-a 7-a -CHrCHrCHrCHr t.t.57,6 C 6-a 7-a -CH = CH-CH = CH- 11.226,3 32 / (000 (¾ 7-a 8-a C (C11 ₃₎ = C (CH 3> O- 11.208.8 ° C). (000 (¾ 8-a 8-a ttl712 C /. (COOH) 2 16-a 6-a O-CHi-O 11.1693 Ή2 (0001¾. 1/2 Hf)

Example 9-a

A mixture of intermediate 15-a (0.02 mol) and 2-methylthioimidazole monohydrochloride (0.02 mol) in ethanol (100 ml) was stirred and refluxed for 16 hours, then the solvent was evaporated. The residue was purified by column chromatography on silica gel using a 90: 9: 1 mixture of dichloromethane, methanol and methanol as the eluent. The pure fractions were collected and the solvent was evaporated. The residue was dissolved in 2-propanol and converted into the hydrochloric acid salt (1: 2) by treatment with a mixture of hydrochloric acid and 2-propanol. The salt obtained is filtered off and dried. 2.4 g of (±) -N- (4,5-dihydro-1H-imidazol-2-yl) -N '- [(2,3,4,7,8,9-hexahydrocyclopentaphthyl) -1-benzopyran are obtained. -2-yl) methyl] -1,3-propanediamine dihydrochloride hemihydrate, m.p.

189.7 ° C (compound 9-a).

Example 10-a

A mixture of compound (1-a) (0.0099 mol) in methanol (300 ml) was hydrogenated using palladium on charcoal (10%, 2 g) as a catalyst and a solution of thiophene (4%, 1 ml). After uptake of 2 equivalents of hydrogen, the catalyst was filtered off, the filtrate was evaporated and the residue was recrystallized from methanol. The resulting precipitate was filtered off and dried. This fraction was recrystallized from methanol. The precipitate was filtered off and dried. 0.9 g (16.9%) of product is obtained. The mother liquor was evaporated and the residue dried to give 0.4 g (7.5%) of (±) -N [(2,3,4,7,8,9-hexahydrobenzo [2,1b: 3,4] -b '] dipyran-2-yl) methyl] N' - (1,4,5,6-tetrahydro-2-pyrimidinyl) -1,3-propanediaminethanedioate (1: 2), m.p. 226.9 ° C ( compound 10-a).

Table 2-a

Zl.č. Pr. no. R ⁵ , R ⁶ q Physical data 9-a 9-a -ch ₂ -ch ₂ -ch ₂ - 1 tt.l89,7O.2HCl.l / 2HjO 10-a 10-a -CH ₂ -CH ₂ -CH ₂ -O- 2 112269X7.2 (00011) 2 11-a 10-a -ch ₂ -ch ₂ -ch ₂ - 2 tt210,0X7.2HCl 12-a 10-a -o-ch ₂ -ch ₂ -o- 2 tt209, IV.2 (COOH) 2 13-a 10-a -CHrCHrCHrCHj- 2 .2HC1.2H £> 14-a 10-a -qchjXXchjK) 2 tt2109T7.2 (COOH)> 15-a 10-a CHCHKUPTIO 2 tt206,4Xľ.2 (COOHh 17 and 10-a -o-ch ₂ -o- 2 11199.1 ^ 72 (0001¾

B. Preparation of the compounds of formula (I), wherein R ⁵ and R ⁶ is R ^5b and R ^6b and the intermediates thereof

Example 1-b

a) Dissolve 6-Fluoro-3,4-dihydro-2H-1-benzopyran-2-methanol (0.093 mol) in acetic acid (100 mL). The iodo monochloride (0.150 mol) was heated to 35 ° C and added to a solution of 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-methanol in acetic acid. The reaction mixture was stirred and refluxed for 24 hours, cooled, poured onto ice (200 mL) and extracted with dichloromethane. The separated organic layer was dried, filtered and evaporated. The residue was purified by flash chromatography on silica gel using dichloromethane as eluent. The desired fractions were collected and the solvent was evaporated. 23.6 g (72.2%) of (±) -6-fluoro-3,4-dihydro-8-iodo-2H-1-benzopyran-2-methanol acetate (ester) (intermediate 1-b) were obtained. .

b) Intermediate 1-b (0.035 mol) was dissolved in N, N-diethylethanamine (250 ml), nitrogen was bubbled through the solution for 15 minutes and bis (triphenylphosphine) palladium (II) chloride (0.00042 mol), copper (I) iodide was added. (0.0015 mol) and trimethylsilylacetylene (0.056 mol). The reaction mixture was stirred at 50 ° C (under a stream of nitrogen) for 30 minutes. The mixture was cooled and the solvent was evaporated. The residue was dissolved in ammonia saturated methanol (50 mL) and the solution was stirred at room temperature for 4 hours, then the solvent was evaporated. The residue was purified by column chromatography on silica gel (dichloromethane / methanol 97: 3). The desired fractions (a mixture of several compounds) were collected and the solvent was evaporated. The residue (7.1 g) was dissolved in dichloromethane (150 mL). To the solution was added N, N-diethylethanamine (15 mL) followed by 4-methylbenzenesulfonyl chloride (0.035 mol). The reaction mixture was stirred at room temperature overnight. Water (150 mL) was added. The organic layer was separated. The aqueous layer was washed with dichloromethane (150 mL). The combined organic layers were dried over magnesium sulfate, filtered, and the solvent was evaporated. The residue was purified by column chromatography on silica gel using dichloromethane as eluent. The pure fractions were collected and the solvent was evaporated. 7.16 g (56.8%) of product are obtained. This fraction was recrystallized from DIPE. The resulting precipitate was filtered off and dried. 4.27 g (33.9%) of (±) -8-ethynyl-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-methanol 4-methylbenzenesulfonate (ester), m.p. 120, 2 ° C (interm. 2-b).

(±) -methyl-3- [6-fluoro-3,4-dihydro-2 - [[[(4-methylphenylsulfonyl) oxy] methyl] -2H-1-benzopyran-8-yl] - 2-Propenoate (intermediate 3-b).

Example 2-b

A suspension of (±) -methyl-6-fluoro-3,4-dihydro-8-iodo-2H-1-benzopyran-2-carboxylate (0.026 mol), (trifluoromethyl) trimethylsilane (0.081 mol), copper iodide (0 , 1 mol) and potassium fluoride (0.081 mol) in a mixture of dimethylformamide (50 ml) and 1-methyl-2-pyrrolidinone (50 ml) were stirred at 60 ° C for 3 hours. The reaction mixture was cooled and poured into a solution of ferric chloride (200 g) and hydrochloric acid (50 ml) in water (300 ml). The resulting mixture was extracted three times with diethyl ether (150 mL). The combined organic layers were washed with 5% aqueous sodium thiosulfate solution (discolored), dried over magnesium sulfate, filtered and evaporated. from them. The residue was purified by flash chromatography on silica gel using dichloromethane as eluent. The pure fractions were collected and the solvent was evaporated. 5.7 g (78.8%) of product are obtained. This product was recrystallized from DIPE. The precipitate was filtered off and dried. 1.2 g (16.6%) of (±) -methyl-6-fluoro-3,4-dihydro-8- (trifluoromethyl) -2H-1-benzopyran-2-carboxylate are obtained, m.p. C (intermediate 4-b).

Example 3-b

a) A solution of intermediate 1-b (0.022 mol), 2-tributylstanylfuran (0.024 mol) and tetrakis (triphenylphosphine) palladium (0.0005 mol) in 1-methyl-2-pyrrolidinone (50 ml) was stirred for 16 hours at 100 ° C. The reaction mixture was cooled and poured into water (200 mL) and the resulting mixture was extracted with DIPE (200 mL). The separated organic layer was dried, filtered and the solvent was evaporated. The residue was stirred in saturated methanolic ammonia solution (50 mL) for 16 h. The solvent was evaporated and the residue was purified by silica gel column chromatography using a 50:50 gradient of dichloromethane in hexane to pure dichloromethane as eluent. The desired fractions were collected and the solvent was evaporated. 4.5 g (82.4%) of (±) -6-fluoro-8- (2-furyl-3,4-dihydro-2H-1-benzopyran-2-methanol (interm. 5-b)) was obtained.

b) 4-Methylbenzenesulfonyl chloride (0.021 mol) was added to a solution of intermediate 5-b (0.018 mol) in dichloromethane (50 ml), and zmesi, Ν-diethyl ethanone (5 ml) was added. The reaction mixture was stirred at room temperature for 24 hours, poured into water and extracted with dichloromethane. The separated organic layer was dried, filtered and the solvent was evaporated. The residue was purified by column chromatography on silica gel using dichloromethane / hexane (50:50) as eluent. The pure fractions were collected and the solvent was evaporated. The residue was stirred in DIPE. The white precipitate is filtered off and dried.

5.2 g (71.8%) of (±) -6-fluoro-8- (2-furyl) -3,4-dihydro-2H-1-benzopyran-2-methanol 4-methylbenzenesulfonate (ester) are obtained with mp 110.4 ° C (intermediate 6-b).

A similar procedure also produces:

(±) -6-fluoro-3,4-dihydro-8 (2-thienyl) -2H-1-benzopyran-2-methanol 4-methylbenzenesulfonate (ester) (interm. 7-b);

(±) -6-fluoro-3,4-dihydro-8-phenyl-2H-1-benzopyran-2-methanol 4-methylbenzenesulfonate (ester) (interm. 8-b);

(±) -6-fluoro-3,4-dihydro-8 (2-pyridyl) -2H-1-benzopyran-2-methanol 4-methylbenzenesulfonate (ester) (interm. 9-b);

(±) -8- (ethylthio) -6-fluoro-3,4-dihydro-2H-1-benzopyran-2-methanol methanesulfonate (m.p. 107.7 ° C (interm. 10-b)) and methanesulfonate ( (±) -6-fluoro-3,4-dihydro-8- (phenylthio) -2H-1-benzopyran-2-methanol ester (interm. 11-b).

Example 4-b

A solution of intermediate 11-b (0.016 mol) in dichloromethane (15 ml) was added dropwise to a mixture of alumina (16 g, neutral, wet) and 2 KHSO ₅ . KHSO ₄ . K ₂ SO ₄ (0.016 mol) in dichloromethane (65 mL). The reaction mixture was stirred overnight at room temperature, then filtered, washed with dichloromethane, and the filtrate was dried over magnesium sulfate, filtered and the solvent was evaporated. The residue was purified by silica gel column chromatography using a 97.5 mixture of dichloromethane and methanol; 2.5 as eluent. The desired fractions were collected and the solvent was evaporated. The residue (7.2 g) was purified by column chromatography on silica gel, eluting with dichloromethane with an increasing proportion of methanol containing 100: 0 to 50:50 ammonia. The pure fractions were collected and the solvent was evaporated. 3.8 g (61.8%) of (±) -6-fluoro-3,4-dihydro-8- (phenylsulfinyl) 2H-1-benzopyran-2-methanol methanesulfonate (ester) (intermediate) are obtained.

12-b).

Example 5-b

a) (±) -Methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate (0.26 mol) was added to stirred nitric acid (300 ml). The reaction mixture was stirred at 40 ° C for 10 minutes, at 60 ° C for 60 minutes and poured into water. The resulting precipitate was filtered off and the filtrate was extracted with dichloromethane. The separated organic layer was evaporated to a 33 g residue. 33 g of (±) -6-fluoro-3,4-dihydro-8-nitro-2H-1-benzopyran-2-carboxylic acid are obtained (intermediate 13-b).

b) A 1M solution of borane-dimethylsulfide complex in dichloromethane (0.28 mol) was added dropwise to a mixture of intermediate 13-b (0.25 mol) in tetrahydrofuran (800 ml) stirred under a stream of nitrogen. About 60 ml of solvent is removed by distillation. The reaction mixture was stirred and refluxed for 2 hours. The mixture was cooled, quenched with methanol (20 mL) and poured into a mixture of water and sodium hydroxide. The resulting mixture was extracted with dichloromethane. The separated organic layer was washed with water, dried over magnesium sulfate, filtered and the solvent was removed. 59 g of (±) -6-fluoro-3,4-dihydro-8-nitro-2H-1-benzopyran-2-methanol (104% of crude product) are obtained (intermediate 14-b).

c) A mixture of intermediate 14-b (0.25 mol), 3,4-dihydro-2H-pyran (0.50 mol) and hydrochloric acid in 2-propanol (0.5 ml) in trichloromethane (700 ml) was added. Stir 3 hours in a water bath. The reaction mixture was washed with 10% sodium hydroxide solution. The organic layer was separated, dried (MgSO 4), filtered and the solvent was evaporated. 81 g of (±) -6-fluoro-3,4-dihydro-8-nitro are obtained

-2 - [[(tetrahydro-2H-pyran-2-yl) oxy] methyl] -2H-1-benzopyran (104% crude residue) (intermediate 15-b).

d) A mixture of intermediate 15-b (0.47 mol) in methanol (600 ml) was hydrogenated using palladium on charcoal containing 10% palladium (5 g) as a catalyst in the presence of a 4% thiophene solution (3 ml). After uptake of 3 equivalents of hydrogen, the catalyst was filtered off and the filtrate was evaporated. 130 g (98.3%) of (±) -6-fluoro-3,4-dihydro-2 - [[(tetrahydro-2H-pyran-2-yl) oxy] methyl] -2H-1-benzopyran- Of 8-amine (intermediate 16-b).

e) A mixture of intermediate 16-b (0.036 mol), 2,5-dimethoxytetrahydrofuran (0.22 mol) and PTSA (catalytic amount) in dimethylformamide (140 ml) was stirred at 100 ° C for 90 minutes, then the solvent was evaporated. . The residue was dissolved in dichloromethane. The organic solution was washed once with water, dried over magnesium sulfate, filtered and the solvent was evaporated under reduced pressure. The residue was purified by column chromatography on silica gel using dichloromethane as eluent. The pure fractions were collected and the solvent was evaporated. There was obtained 6.6 g (55.3%) of (±) -6-fluoro-3,4-dihydro-8- (1H-pyrrol-1-yl) -2 - [[(tetrahydro-2H-pyran-2)]. -yl) oxy] methyl] -2H-1-benzopyran (intermediate 17-b).

f) A 10% solution of hydrochloric acid (25 ml) was added to a mixture of intermediate 17-b (0.019 mol) in methanol (65 ml). The reaction mixture was stirred at room temperature for 60 minutes, then the solvent was evaporated. The residue was partitioned between dichloromethane and water. The organic layer was separated, dried (MgSO 4), filtered and the solvent was evaporated. The residue was purified using silica gel filtration through a glass filter eluting with dichloromethane: methanol (98: 2). The pure fractions were collected and the solvent was evaporated. 3.4 g (72.4%) of (±) -6-fluoro-3,4-dihydro-8- (1H-pyrrol-1-yl) -2H-1-benzopyran-2-methanol (interm. 18) were obtained. -b).

g) N, N-Dimethylethanamine (7 ml) was added dropwise with stirring and cooling in an ice bath to a mixture of intermediate 18-b (0.024 mol) and methanesulfonyl chloride (0.035 mol) in 2-propanone (30 ml). The reaction mixture was stirred for 1 hour, filtered and the filtrate was evaporated. The residue was dissolved in dichloromethane. The organic solution was washed with aqueous hydrochloric acid, dried (MgSO4), filtered and the solvent was evaporated. There was obtained 7.6 g (97.3%) of (±) -6-fluoro-3,4-dihydro-8- (1H-pyrrol-1-yl) -2H-1-benzopyran-2- (ester) methanesulfonate (ester) of methanol (intermediate 19-b).

Example 6-b

A solution of bromine (Br ₂ ) (0.01 mol) in dichloromethane (50 mL) was added dropwise with stirring at 0 ° C to a solution of (±) -6-fluoro-3,4-dihydro-4-methylbenzenesulfonate (ester). 8- (2-Thienyl) -2H-1-benzopyran-2-methanol (0.01 mol) in dichloromethane (50 ml). The reaction mixture was poured into water. The organic layer was separated, dried, filtered and the solvent was evaporated. The residue was recrystallized from DIPE. The resulting precipitate was filtered off and dried. 3.8 g (76.4%) of (±) -8- (5-bromo-2-thienyl) -6-fluoro-3,4-dihydro-2H-1-benzopyran- (4-methylbenzenesulfonate (ester)) are obtained. 2-methanol (intermediate 20-b).

Example 7-b

Calcium oxide (5 g) was added to the intermediate solution

2-b (0.0125 mol) and N-2-pyrimidinyl-1,3-propanediamine (0.019 mol) in tetrahydrofuran (100 ml). The reaction mixture was stirred overnight at 150 ° C (in a pressure vessel), then cooled and filtered. The filtrate was evaporated and the residue was purified by column chromatography on silica gel using dichloromethane first, then dichloromethane with increasing volume.

2826 methanol up to the dichloromethane ratio; methanol = 90: 10. The two desired fractions were collected and the solvent was evaporated. 1.2 g of pure fraction are obtained. This fraction was dissolved in methanol (100 mL) and converted into the ethanedioic acid salt (1: 1) by treatment with ethanedioic acid hydrate (0.620 g). The mixture was concentrated and 2-propanone was added. The resulting precipitate was filtered off and dried. 1.2 g (22.3%) of ethanedioate (1: 1) are obtained (± N - [(8-ethynyl-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl) methyl] -N'-2-pyrimidinyl-1,3-propanediamine, m.p. 201.1 ° C (compounds 1-b).

Example 8-b

A solution of diisobutylaluminum hydride in methylbenzene (20%, 22 mL) was added dropwise to a solution of intermediate 4-b (0.018 mol) in methylbenzene (50 mL) with stirring at -70 ° C. The mixture was stirred at -70 ° C for 1 h. Methanol (10 mL) was added. The resulting mixture was warmed to room temperature, poured into water, acidified with hydrochloric acid and extracted with dichloromethane. The separated organic layer was evaporated. The residue was treated with N-2-pyrimidinyl-1,3-propenediamine (0.014 mol) and hydrogenated using palladium (2 g) as a catalyst and in the presence of a thiophene solution (4%, 2 mL). After uptake of 250 ml of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by silica gel column chromatography using a 90:10 mixture of dichloromethane and methanol. The pure fractions were collected and the solvent was evaporated. The residue (2.2 g) was dissolved in ethanol (50 mL) and converted into the ethanedioic acid salt (1: 1) by treatment with ethanedioic acid (0.024 mol). The resulting precipitate was filtered off and dried. This fraction was recrystallized from methanol (about 300 mL). The precipitate obtained is filtered off and dried. 0.950 g (13.6%) of (±) - N - [[6-fluoro-3,4-dihydro-8- (trifluoromethyl) -2H-1-benzopyran-2-yl] methyl] -N 'ethanedioate is obtained. -2-pyrimidinyl-1,3-propanediamine (1: 1), m.p. 216.3 ° C (compound 2-b).

Example 9-b

A solution of the free base of compound (2-b) (0.00313 mol) and ethanedioic acid dihydrate (0.00635 mol) in methanol (50 ml) was hydrogenated at 50 ° C for 2 hours in the presence of palladium on charcoal (1 g), as a catalyst. After uptake of 2 equivalents of hydrogen, the catalyst was filtered off and the filtrate was concentrated. The resulting precipitate was filtered off (*) and dried. 0.310 g (17.2%) of product is obtained. The corresponding (*) filtrate was mixed with 2-propanone. The resulting precipitate was filtered off and dried. 0.500 g (27.7%) of ethanedioate hemihydrate (±) - N - [[6-fluoro-3,4-dihydro-8- (trifluoromethyl) -2H-1-benzopyran-2-yl] methyl] -N was obtained. 1- (1,4,5,6-tetrahydro-2-pyrimidinyl) -1,3-propanediamine (2: 1), m.p. 177.1 ° C (compound 3-b).

Example 10-b

The reaction is carried out under a stream of nitrogen. A solution of Bu ₃ SnSCH ₂ COOEt (0.011 mol) in methylbenzene (40 ml) was added dropwise to a mixture of intermediate 1-b (0.011 mol) and tetrakis (triphenylphosphine) palladium (0.00029 mol) in methylbenzene (160 ml). The reaction mixture was stirred and refluxed overnight, cooled, washed with 10% potassium fluoride solution, dried (MgSO4), filtered and the solvent was evaporated. The residue was purified using silica gel in a glass filter, eluting with a 95: 5 mixture of dichloromethane and methanol containing ammonia. The desired fractions were collected and the solvent was evaporated. The residue was dissolved in 2-propanone and converted to the ethanedioic acid salt (1: 2). The precipitate was filtered off and dried (under vacuum at 60 ° C). 4.4 g (65.1%) of (±) -ethyl - [[6-fluoro-3,4-dihydro-2 - [[[3- (2-pyrimidmylamino) propyl] amino] methyl] - ethanedioate are obtained. 2H-1-benzopyran-8-yl] -thiojoacetate (2: 1), m.p. 154.4 ° C (compound)

17-b).

Table 1-b

Zl. à Pr. f. Q Physical data 1-b lb -cache 2-pyrimidinyl 1.1. 201.1’0. (COOHh 2-b 2-b CF, 2-pyrimidinyl 1.1. 216.3'0. (COOHh 3-b 3-b cf ₃ -ABOUT N < 1.1. 177, I ^e O.2 (C00Hh · 1/2 HJO 4-b 1-b -CH = CH-C (= O) OCH 2-pyrimidinyl (E) .2 (COOH) j 5-b 1-b 2-furyl 2-pyrimidinyl 1.1. 192.8 ° C / 2 (COOH) ₂ 6-b 1-b 2-t »thienyl 2-pyrimidinyl H 1.1. 205.8'0.3 / 2 (COOHh 7-b 3-b 2-Pienyl x N — k -Ό H / 1.1. 216,8'0.2 (COOHh 8-b 1-b 5-bromo-2-t> thienyl 2-pyrimidinyl H 1.1. 191.5’0.2 (COOHh 9-b 3-b - (CH 2) 2'C (O) -OCH3 -O N — f 1.1. 209.6-0.2 (COOH) ₂ 10-b 1-b phenyl 2-pyrimidinyl 1.1.-159.2’0.2 (COOHh In-a 1-b 2-pyridyl 2-pyrimidinyl 1.1. 158,9´0 / (E) -2-butanedioate (1: 1) 12-b 1-b -S-CH 2 -CH 3 2-pyrimidinyl 1.1. 160.6’0 2 (COOHh 13-b 1-b fenylkio 2-pyrimidinyl 1.1. 181.0’0 2 (COOHh 14-b 1-b phenylsulfinyl 2-pyrimidinyl 1.1. ! 29.4'C / 2 (COOHh 15-b 1-b H-pyrxol-yl 2-pyrimidine! H 1.1. 162.1 ° C / 2 (COOHh 16-b 3-b H-pyrrol-1-yl N-f 1.1. 177.7’0.2 (COOHh 17-b 4-b -S-CH 2 -C (= O) -OCH ₂ CH ₃ 2-pyrimidinyl M mp 154.4’02 (COOHh 18-b 3-b 2-pyridyl -Q N » -t. 186.3’0.2 (COOHh

C. Preparation of compounds of formula (I) wherein R ⁵ and R ⁶ represent R ^5c and a intermediates for their preparation

Example 1-c

A mixture of 3,6-dichloropyridazine (0.168 mol), 1,3-propanediamine (0.84 mol) and sodium carbonate (0.17 mol) in ethanol (500 ml) was refluxed with stirring overnight. The reaction mixture was filtered through dicalite and the filtrate was evaporated. The residue was recrystallized from acetonitrile. The crystals formed are filtered off and dried. There was thus obtained N- (6-chloro-3-pyridazinyl) -1,3-propanediamine (20.7 g), m.p. 124.9 ° C (intermediate 1-c).

Similarly, the following are also produced:

N-3-pyridazinyl-1,3-propanediamine dihydrochloride, m.p. 210.9 ° C (intermediate 2-c); and

N- (6-methyl-3-pyridazinyl) -1,3-propanediamine (interm. 3-c) ·

Example 2-c

a) A mixture of (±) -3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] (phenylmethyl) amino] propanenitrile (0.069 mol) in methanol (250 mL) is hydrogenated in the presence of Raney-nickel (5 g) as a catalyst. After uptake of 2 equivalents of hydrogen, the catalyst was filtered off and the filtrate was evaporated. 20 g (94% of crude product) of N - [(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] -N- (phenylmethyl) -1,3-propanediamine (intermediate 4-c) were obtained. .

b) A mixture of intermediate 4-c (0.01 mol) and 2-methylthio-4 (1H) pyrimidinone (0.01 mol) was heated at 150 ° C for 2 hours. The residue was purified by column chromatography on silica gel (dichloromethane / methanol 95: 5). The pure fractions were collected and the solvent was evaporated. The residue was converted by reaction with a mixture of hydrochloric acid and 2-propanol to a salt with hydrochloric acid (1: 2). The crude product is recrystallized from 1,1'-oxybisethane. The salt obtained is filtered off and dried. 2.8 g (56.5%) of (±) -2 - [[3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] (phenylmethyl) amino] monohydrate are obtained. propyl] amino] -4 (1H) -pyrimidinone, m.p. 150.2 ° C (interm. 5-c).

In a similar way:

Table 1-c

5-C - (ch ₂ ) ₃ - 4-hydroxy-2-pyrln) oxazolidinyl mp 150.2 ° C / 2HCl.H ₂ O 6-C - <ch ₂ ) ₂ - 4-hydroxy-6-pyrimidinyl-netyl2 mp 212.1 ’C / .2HC1 7-a - (ch ₂ ) ₂ - 4-hydroxy-6-propyl 2-pyrimidinyl 1.1. 190.5 ’C / . 2HC1 8-C - (ch ₂ ) ₃ - 2-pyrazinyl 9-C - <ch ₂ ) ₃ - 5-chloro-2-pyridyl mp 111.3 DEG C. /. 2HC1.1 / 2H _Z 10-C -Cch ₂ > ₃ - 2-chloro-4-pyrimidinyl 11-a - (ch ₂ ) ₃ - 2-Nethoxy-4-pyrrolidinyl 12-C - (CH) j 2- (dinetylaraino) -4pyrinidinyl 13-a - (ch ₂ ) ₃ - 2- (1-piperidinyl) -4-pyrimidinyl 14-C - <ch ₂ ) ₃ - 2- (methylamino) -4pyrinidinyl Example 3-c

a) A mixture of 2-chlorocarbonyl-3,4-dihydro-2H-1-benzopyran (0.47 mol) in N, N-dimethylacetamide (100 ml), thiophene solution (4%) (3 ml) and 2,2 ' -oxybispropane (400 mL) was hydrogenated in the presence of palladium on charcoal (10%, 5 g) as a catalyst. After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was treated with potassium acetate (20 g) and benzenemethanamine (50 g) in N, N-dimethylacetamide (2 mL) and methanol (300 mL) and hydrogenated in the presence of palladium on charcoal (10%, 5 g), as a catalyst. After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue in methanol (500 mL) was hydrogenated in the presence of palladium on charcoal (10%, 5 g) as a catalyst. After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was taken up in 1,1'-oxybisethane and washed with sodium hydroxide solution. The organic layer was dried (MgSO 4), filtered and evaporated. The residue (70 g) was distilled at 70 ° C at 13.3 Pa. 48.7 g (63.5%) of (±) -3,4-dihydro-2H-1-benzopyran-2-methanamine (intermediate 15-c) are obtained.

b) A mixture of intermediate 15-c (0.12 mol) and 2-propenenitrile (0.12 mol) in ethanol (235 ml) was stirred and refluxed for 4 hours. The solvent was then evaporated from the mixture to give 27 g of a crude residue of (±) -3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] amino] propanenitrile (intermediate 16-c). ).

c) A mixture of intermediate 16-c (0.12 mol) in methanol saturated with ammonia (500 ml) was hydrogenated in the presence of Raney nickel (6 g) as a catalyst. After uptake of 2 equivalents of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue is purified by distillation. 24 g (90.8%) of (±) -N - [(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] -1,3-propanediamine (interm. 17-c) are obtained.

B. Preparation of Final Compounds (-c) Example 4-c

A mixture of intermediate 1-c (0.058 mol), 3,4-dihydro-2H-1-benzopyran-2-carboxaldehyde (0.064 mol) and potassium acetate (7.1 g) in methanol (200 ml) was hydrogenated using platinum to activated carbon (5%, 2 g) as a catalyst in the presence of a solution of thiophene (4%, 1 mL). After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was dissolved in a mixture of water and dichloromethane and the solution basified with sodium hydroxide. The organic layer was separated, dried (MgSO 4), filtered and the solvent was evaporated. The residue was purified by column chromatography on silica gel using dichloromethane / methanol (90/10) as eluent. Two fractions were collected. The first fraction was evaporated and the residue was recrystallized from 2-propanol. The crystals are filtered off and dried. The second fraction was evaporated and the residue was recrystallized from 2-propanol. The crystals are filtered off and dried. 3.09 g (16%) of (±) -N- (6-chloro-3-pyridazinyl) -N '- [(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] - are obtained. 1,3-propanediamine, m.p.

107.8 ° C (compound 1-c).

Example 5-c

Intermediate 5-c (0.005 mol) was hydrogenated in methanol (250 ml) in the presence of palladium on charcoal (2 g) as a catalyst. After uptake of 1 equivalent of hydrogen, the catalyst was filtered off and the solvent was evaporated. The residue (2 g) was recrystallized from methanol. The crystals are filtered off and dried. 0.7 g (36%) of (±) -2 - [[3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] amino] propyl] amino] -4 dihydrochloride is obtained. (1H) pyrimidinone (compound 8-c).

Example 6-c

A mixture of intermediate 17-c (0.03 mol) and 2-methylthio-4 (1H) -pyrimidinone (0.03 mol) in 2-methoxyethanol (50 ml) was stirred and refluxed overnight. The solvent was evaporated from the mixture and the residue was stirred in water and extracted with dichloromethane. The separated organic layer was dried over magnesium sulfate, filtered, and the solvent was evaporated. The residue was purified by column chromatography on silica gel using a 95: 5 mixture of dichloromethane and methanol as the eluent. The pure fractions were collected and the solvent was evaporated. The residue was dissolved in 2-propanone and converted to the ethanedioic acid salt (2: 3). The salt obtained is filtered off and recrystallized from methanol. The resulting solid (1.2 g) was filtered off and dried. 1.0 g (7.4%) of (±) -2 - [[3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] amino] propyl] amino] ethanedioate is obtained. -4 (3H) pyrimidinone (3: 2), m.p. 206.7 ° C (compound 9-c).

SK 282402 Β6

Example 7-c

(±) - N ² - [3 - [[(3,4-Dihydro-2H-1-benzopyran-2-yl) methyl] amino] propyl] -N ⁴ , N ⁴ -dimethyl-2,4- dihydrochloride mixture Pyrimidinediamine (0.0067 mol) in methanol (150 ml) was hydrogenated using palladium on charcoal (10%, 2 g) as a catalyst and in the presence of a solution of hydrochloric acid in 2-propanol (2 ml). After uptake of 2 equivalents of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue is recrystallized twice from methanol. The crystals formed are filtered off and dried. 0.32 g (13.1%) of (±) -2 - [[3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] amino] propyl] amino] dihydrochloride is obtained. -5,6-dihydro-4 (3H) -pyrimidinone, m.p. 273.6 ° C (compound 12-c).

Example 8-c

A mixture of 17-c (0.02 mol) in methanol (200 mL) was hydrogenated in the presence of palladium on charcoal (10%, 2 g) as a catalyst. After uptake of 2 equivalents of hydrogen, the catalyst was filtered off and the filtrate was evaporated. The residue was dissolved in 2-propanol and converted into the hydrochloric acid salt (1: 2) by treatment with a mixture of hydrochloric acid and 2-propanol. The resulting salt was filtered off and dried. 5.61 g (75%) of (±) -N - [(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] -N '- (3,4,5,6) dihydrochloride are obtained. -tetrahydro-2-pyridyl) -1,3-propanediamine, m.p. 211.1 ° C (compound 15-c).

Example 9-c

A mixture of 19-c free base (0.0145 mol) and Raney nickel (5 g) in tetrahydrofuran (150 ml) was stirred and refluxed for 1 hour. Then the catalyst is filtered off and the filtrate is evaporated. The residue was dissolved in 2-propanone and converted to the ethanedioic acid salt (1: 2). The resulting salt (3 g) was filtered off and recrystallized from methanol (600 ml). The crystals are filtered off and dried. 2.5 g (36.2%) of (±) - N - [(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] -N'-4-pyrimidinyl-1,3-ethanedioate are obtained. -propanediamine (2: 1), m.p. 222.2 ° C (compound 20-c).

Table 2-c

Zl.č. EX R ^Ä

Physical data

7-C 6-a 7-CH ₂ -CH ₃ Cl 1.1. 223,9'C / .2HC1 25-a 4-a 8-OCH ₃ Cl 1.1. 182,6'C / .2HCL .h ₂ on 26-a 5-a H CN mp 192.3 ° C / (cooh) ₂ 27-C 5-a H OH mp 191 &apos; C / (COOH) ₂ 28-a 5-C H -c (= o) -nh ₂ mp 211.7 ° C / (cooh) ₂

Table 3-c

Zl. l · Pr. no. RA R 2 R ' alk rb Physical data 8-c 5-a H H H (CH ₃ ) ₃ - H -2HCl 9-a 6-a H H H - (CH ₂ ) 3 - H 1.1. 206.7 ° C / 3.3 (COOHh 10-a 6-a H H H (CH ₃ ) ₂ CH ₃ 1.1. 227, .2HCI IL-c 6-a H H H - (CHih- H 1. ₁ . 227,6X7.2HCI

Table 4-c

Evil. EX ¹ RA RZ rl Physical data 12-a 7-c | H H H tt 273.2 ^e C / 2HCl

Table 5-c

Zl. no. Pr. c. ra R ² R ¹ AJK R ^a Physical data 13-a 6-a 6-F H H - (CH 2) 3 · H 1.1. 198.1Ό .2HCl 14-a 5-a H H H - (CH ₂ ) 3 - H mp 188,9'C / .2HCI

Table 6-c

1-a 4-a H Cl 2-a 4-C H H 3-C 4-a H ch ₃ 4c 4-C H Cl 5c 4-a 6-F Cl 6c 4-a 6-F Cl

mp 107.8 ° C

mp 169.7 ° C (2HCl) 1 / 2H ₂ O

mp 158.7 ° C (2HCl) 1 / 2H ₂ O

1.1. 203, [deg.] C. [.alpha.] _D @ ²⁰ = -48.51 (c = 1% in methanol) / (*) - (R) -2HCl

mp 229.3 ° C / [α] ²⁰ _{D -} 27.00 · (c = lt in methanol) / (~) - (R) -2HCl

mp 243.2 ° C / t] ²⁰ _D - + 33.67 · (c = 1% in methanol) / (+) - (S) -2HCl

Zl.č. pR.com RA R ² alk RB n Physical data 15-a 8-c H H - <CH ₂ h- H 2 mp 2LL, l ° C / .2HCl

Table 7-c

Zl.č. pR.com ra R 2 alk R ¹ RB RC Physical data 16- c 17- c 4-a 4-a H H H H - (CHjJj- H H H 6-CH3 H 3 -C (O) NH ₂ mp 182.6X7.2HCl, mp 246.9X7.2HQ.H2O

Table 8-c

Zl. δ, Pr. δ. R ^A R 2 R ' alk R ^a Physical data 18-a 6-a H H H • (CHih- -S-CH MP: 225.8 C / .2 (COOHh 19-a 10-a H H H - (CHih- H mp 222.2 ^e C / 2 (COOH) 2 20-a IO-C H CH2CH3 H • (CH ₃₎ 3 H 1.1. 1717.4 ° C7.2 (COOH) 2ΙΛΗ2Ο 21-C 5-a H H H - (CH ₃₎ 3 · -o-ch ₃ t.tJ7W C / .2 (COOHh 22-C 5-a H H H • (CH ₂₎ j -N (CH ₃ ) 2 t.t.204,6 ° C7.2 (COOH) 2 23-a 5-a H H H • (CH ₂₎ j 1-piperidinyl t.t.206,8 C / .2 (COOH) 2 24-a 5-a H H H _(CH2) j. -NH-CH ttl88 l ^of Cy.2 (C00H) 2

Table 9-c

Zl. no. Fr. no. R ^Ä Q Physical data 29-a 6-C 6-F 2-thiazolyl mp 145.3 DEG / .2HC1 30-a 5-a H N-N mp 156.2 ° C ^X OH 31-a 5-a H H 1.1. 214-c Λ / Ο 32-a 6-C H N-N mp 184.9-C / (COOH) ₂ OH 33-a 6-a H b * ^- \ mp 168.2 ° C

Table 10-c

N-R * ^N CCHih-N- C-N-R ® R ^c

51. č. Pr. RÄ RB mp ( 'C / base / salt 34-a 6-a H CN 2-phenylethyl methyl 159.4 / 2 (COOH) ₂ 35-a 9-a H H 2-phenylethyl methyl 198.5 36-a 6-a B CN (2-methoxyphenyl) methyl methyl 166} (CCOH) ₂ 37-a 9-a H H (2-methoxyphenyl) methyl methyl 191.9 / 2H ₅ O 3 8-c 6-a H CN 4-methyl-l-piperMinyl 171.6 39-a 6-a CHt CN phenylmethyl methyl 142.9 / (0008) 2 40-a 9-a H ³ H cyclohexyl H 242.5 / 2HCl 41-e 9-a H C ( «O) N H cyclohexyl H 201.5 / 2HC1

D. Pharmacological example

Example 1-d

Segments of basilar arteries collected from pigs (anesthetized with pentobarbital sodium) are mounted in an organ bath to record isometric stress. The bath is a Krebs-Henseleite solution. The solution is maintained at 37 ° C and a gas mixture containing 95% oxygen and 5% carbon dioxide is introduced. The samples are stretched until a constant 2 g tension is reached.

The samples were then induced to constrict serotonin (3 x 10 ^-7 M). The response to the addition of serotonin is measured and then the serotonin is removed by washing. This procedure is repeated until a stable response is obtained. The test compound is then added to the bath and the sample constricted. This constrictive response is expressed as a percentage of the response to serotonin measured earlier.

The lowest effective concentration is defined as the concentration at which a 50% response to serotonin is achieved.

Tables 1-d, 2-d and 3-d show the lowest effective concentration of the compounds of formula (I). Table 1-d compound Lowest effective number concentration (M) 1-a 3.10 ' ⁸ 2-a 3 .107 4-a 1. 10’6 5-a 3. 10-7 9-a 1. 10 ' ⁸ 10-a 3.10 ' ⁹ 11-a 3. 10-8 12-a 3 .10 ' ⁸ 13-a 3 .10 ' ⁷ Table 2-d compound Lowest effective number concentration (M) 1-b 1. ío · ⁶ 3-b 3 .10 ' ⁷ 4-b 3. 10 ⁸ 5-b 3 .10 ' ⁸ 6-b 1 .10 ' ⁷ 7-b 3.10 ⁹

Table 3-d

Compound Lowest Effective Number Concentration (M)

3- c 1.10 ’

4- c 1.10 ' ⁷

5- c 3 .W

12- c 1.10

13- c <3. 10 ⁷

14- c 1.10 '

15- c 3.10 ^p

16- c 1.10 ’

18- c 1.10

19- c3.10

21- c 1 .10

22- c 1 .10

23- c 3.W

24- c 3.10

E. Formulation Examples

The term "active ingredient" as used in these examples refers to a compound of formula (I), a pharmaceutically acceptable acid addition salt thereof, or a stereochemically isomeric form thereof.

Example 1-e

Oral drops

500 g of the active ingredient are dissolved in 0.5 l of 2-hydroxypropanoic acid and 1.5 l of polyethylene glycol at 60-80 ° C. After cooling to 30-40 ° C, 35 L of polyethylene glycol is added and mixed well. Then a solution of 1750 g of saccharin sodium in 2.5 l of purified water is added to this mixture and 2.5 l of cocoa flavor and polyethylene glycol are added with stirring up to a volume of 50 l with stirring. amount of 10 mg / ml. The resulting solution is filled into suitable containers.

SK 282402 Β6

Example 2-e

Oral solution

9 g of methyl 4-hydroxybenzoate and 1 g of propyl 4-hydroxybenzoate are dissolved in 4 l of boiling purified water. 10 g of 2,3-dihydroxybutanedioic acid are dissolved in 3 l of this solution, followed by 20 g of active ingredient. This second solution was mixed with the remainder of the first solution and 12 L of 1,2,3-propanetriol and 3 L of 70% sorbitol solution were added to the mixture. 40 g of saccharin sodium are dissolved in 0.5 l of water and 2 ml of raspberry and 2 ml of gooseberry essence are added. The latter solution is mixed with the above solution, water is added, if necessary, up to a volume of 20 L. This gives an oral solution containing the active ingredient in an amount of 5 mg per teaspoon (5 ml). The resulting solution is filled into suitable containers.

Example 3-e Capsules

The mixture of 20 g of active ingredient, 6 g of sodium lauryl sulfate, 56 g of starch, 56 g of lactose, 0.8 g of colloidal silica and 1.2 g of magnesium stearate is intensively mixed. The resulting mixture is filled with 1000 suitable hard gelatin capsules. Each capsule contains 20 mg of active ingredient.

Example 4-e

Film-coated tablets

Manufacture of tablet cores

100 g of the active ingredient, 570 g of lactose and 200 g of starch are mixed well, then the resulting mixture is moistened with a solution of 5 g of sodium dodecyl sulfate and 10 g of polyvinylpyrrolidone in about 200 ml of water. The wet powder mixture is sieved, dried and sieved again. 100 g of microcrystalline cellulose and 15 g of hydrogenated vegetable oil are then added. The resulting mass is mixed well and compressed into tablets. This gives 10,000 tablets, each containing 10 mg of the active ingredient.

Coating of tablets

To a solution of 10 g of methylcellulose in 75 ml of denatured ethanol is added a solution of 5 g of ethylcellulose in 150 ml of dichloromethane. Then 75 ml of dichloromethane and 2.5 ml of 1,2,3-propanetriol are added. 10 g of polyethylene glycol are melted and dissolved in 75 ml of dichloromethane. This second solution is added to the first and 2.5 g of magnesium octadecanoate, 5 g of polyvinylpyrrolidone and 30 ml of concentrated dye suspension are added to the resulting mixture and the resulting mixture is homogenized. The tablet cores are coated with the thus obtained mixture in a coating apparatus.

Example 5-e

Solution for injection

1.8 g of methyl 4-hydroxybenzoate and 0.2 g of propyl 4-hydroxybenzoate are dissolved in approximately 0.5 l of boiling water for injection. The solution is cooled to about 50 ° C and then 4 g of lactic acid, 0.05 g of propylene glycol and 4 g of active ingredient are added thereto with stirring. The solution is cooled to room temperature and made up to 1 L with water for injection as necessary to give a solution containing 4 mg / ml of the active ingredient. This solution is sterilized by filtration (U.S. Pat. XVII, p. 811) and filled with sterile containers.

Example 6-e Suppositories g of the active ingredient are dissolved in a solution of 3 g of 2,3-dihydroxybutanedioic acid in 25 ml of polyethylene glycol 400. 12 g of SPAN ^(R) surfactant and triglyceride (Witepsol 555) qs are melted to 300 g. The resulting mixture is well mixed into the first solution. The mixture was poured into molds at 37-38 ° C. This gives 100 suppositories each containing 30 mg / ml of the active ingredient.

Example 7-e

Solution for injection

Mix 60 g of the active ingredient well with 12 g of benzyl alcohol and add sesame oil q. with. to a volume of 1 L. A solution containing 60 mg / ml of the active ingredient is obtained. This solution is sterilized and filled with sterile containers.

Claims (9)

PATENT CLAIMS Claims 1. Dihydrobenzopyran derivatives of the general formula d) wherein R ¹ , R ² and R ³ each independently represent a hydrogen atom or a C 1 -C 6 alkyl group; R ⁴ is hydrogen, halogen, C 1 -C 6 alkyl, hydroxy, C 1 -C 6 alkoxy, aryloxy or arylmethoxy; R ⁵ and R ⁶ represent R ⁵ "and R ⁶ ", wherein R ⁵ "and R ^f together represent a bivalent radical which is bonded at positions 7 and 8 of the dihydrobenzopyrazine moiety and corresponds to the general formulas (a1) to (al5) -CH = CH-CH = CH- (L), - (CH ₂ ) _t -Z- (A9), - (CH ₂ ) _n - (A2), -Z- (CH ₂ ) _t - (ALO). - (CH ₂ ) _m -X- (A3), -CH = CH-Z- (All). X-fCHjV (A4), -Z-CH = CH- (Al2), -CH = CH-X- (A5), -NH-C (S) -N- (Al3). -X-CH = CH- (A6), -O-C (A) = N- (AL4). -O- (CH ₂ ) _t -Y- (A7), -N = C (A) -O- (AL5). Y- _(CH2), - O- (A8), wherein one or two hydrogen atoms are optionally substituted with (C 1 -C 6) alkyl, (C 1 -C 6) alkylcarbonyl, or (C 1 -C 6) alkylsulfinyl; n is 3 or 4; X at each occurrence is independently -O-, -S-, -S (O) -, -S (O) 2-, -C (O) - or -NR ⁷ -; m, at each occurrence, independently represents 2 or 3; Y at each occurrence is independently -O-, -S-, -S (O) -, -S (O) ₂ -, -C (O) - or -NR ⁷ -, Z is -O-C (O) -, -C (O) -O-, -NH-C (O) -or -C (O) -NH-; t, for each occurrence, is 1 or 2; R ⁷ is hydrogen, C 1 -C 6 alkyl, C 1 -C 6 alkylcarbonyl or C 1 -C 6 alkylsulfinyl; and A, at each occurrence, is independently hydroxy, (C 1 -C 6) alkyl or (C 1 -C 6) alkoxy; or SK 282402 Β6 R ⁵ and R ⁶ are R ^3b and R ^6b , wherein R ^5b is hydrogen and R ^6b is C 1 -C 6 hydroxyalkyl, C 1 -C 6 carboxyalkyl, C 1 -C 6 alkoxycarbonylalkyl and 1 to 6 carbon atoms in the alkyl radical, trihalomethyl, alkylcarbonyl of 1 to 6 carbon atoms in the alkyl radical, alkoxycarbonylalkylthio of 1 to 6 carbon atoms in the alkoxy and 1 to 6 carbon atoms of the alkyl radical, carboxyalkylthio of the 1 to 6 carbon atoms. the alkyl group, alkylthio of 1 to 6 carbon atoms, alkylsulfinyl of 1 to 6 carbon atoms, arylthio or arylsulfínylskupinu or ^R6b is a radical of formula (bl) through (BL3) R ¹ (kk). - (R-R ⁴⁹ (11)). (Them). (Nn) —C = C-R * (bl), —CHZCH-R ’ (M). Vz ^R V R ' R ¹ ' N — Λ t, II —Ξ, 3 (b7). , ^{n_ 2-- r} ” R ' - ⁽ * ^{) bio} R ' IN (b8), (b3), (b6). (b9), • R ”(b! 3), where R ⁸ and R 'each independently represent hydrogen, carboxy, C 1 -C 6 alkoxycarbonyl, aminocarbonyl or C 1 -C 6 monocarbonyl or di (alkyl) aminocarbonyl; R ¹⁰ , R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ and R ¹⁷ each independently represent hydrogen, halogen or C 1 -C 6 alkyl; R ¹⁸ , R ¹⁹ , R ²⁰ , R ²¹ , R ²² , R ²³ , R ²⁴ and R ²⁵ each independently represent hydrogen or C 1 -C 6 alkyl; or R ⁵ and R ⁶ are R ^5c and R ^6c , in which case R ⁴ is only hydrogen and R ^5c and R ^6c are each independently hydrogen, halogen, C 1 -C 6 alkyl, C 3 -C 6 alkenyl carbon atoms, (C 3 -C 6) alkynyl, hydroxy, (C 1 -C 6) alkoxy, cyano, (C 1 -C 6) aminoalkyl, carboxy, (C 1 -C 6) alkoxycarbonyl, nitro, amino, , (C1 -C6) alkylcarbonylamino or mono-, or (C1 -C6) di (alkyl) amino in each of the alkyl radicals; Alk ¹ is C 1 -C 5 alkanediyl; Alk ² is C 2 -C 15 alkanediyl; Q is a radical of formula (aa) to (nn) NR ²⁶ N -, _{R -} N - ^(bb, ^ ir ^R ” ^{(cc> 2)} R "- // 'Ή' ⁴ \ - <ch ₂ ), / R" R ”/ = <<«). --- Z ^N N- \ R ”(Π) where R ²⁶ is hydrogen, cyano, aminocarbonyl or C 1 -C 6 alkyl; R ( ²⁷⁾ is hydrogen, (C1-C6) alkyl, (C3-C6) alkenyl, (C3-C6) alkynyl, (C3-C6) cycloalkyl or (C1-C6) arylalkyl; R ²⁸ is hydrogen or C 1 -C 6 alkyl; or R ²⁷ and R ^{28 taken} together form a bivalent radical of the formula - (CH ₂ ) ₄ - or - (CH ₂ ) ₅ - or a piperazine radical which is optionally substituted with C 1 -C 6 alkyl; n29 d30 p31 n 36 p37 n38 p39 p41 p41 p41 p42 p43 p44 p45 IX y IX j ix y ix} ix y KJ ix y ix y ix y iX y Ix. R ⁴⁶ , R ⁵³ , R ⁵⁴ and R ⁵⁵ each independently represent hydrogen, hydroxy, halogen, C 1 -C 6 alkyl, C 1 -C 6 alkoxy, aryloxy, C 1 -C 6 arylalkyl C 6 alkyl, C 1 -C 6 alkylthio, cyano, amino, C 1 -C 6 mono- or di (alkyl) amino, C 3 -C 6 mono- or di (cycloalkyl) amino 6 carbon atoms in each of the cycloalkyl radicals, aminocarbonyl, C 1 -C 6 alkoxycarbonylamino, C 1 -C 6 alkylaminocarbonylamino, piperidyl or pyrrolidinyl; R ³² , R ³³ and R ^{52 are} each independently hydrogen, C 1 -C 6 alkyl, C 1 -C 6 alkylcarbonyl or C 1 -C 6 arylalkyl; q is 1, 2 or 3; R ³³ and R ³⁴ each independently represent a hydrogen atom or R ³³ and R ³⁴ together with the carbon atom to which they are attached represent a radical of formula C (O); r is 1, 2 or 3; R ⁴⁷ and R ⁴⁸ each independently represent a hydrogen atom or R ⁴⁷ and R ⁴⁸ together with the carbon atom to which they are attached represent a radical of formula C (O); R ⁴⁹ is hydrogen, halogen or C 1 -C 6 alkyl; R ⁵⁰ represents a hydrogen atom and R ⁵¹ is hydroxy; or R ⁵⁰ and R ^{51 taken} together are a divalent radical of formula (CH ₂ ) ₃ or (CH ₂ ) ₄ , which is optionally substituted with C 1 -C 6 alkyl; and aryl is phenyl optionally substituted with hydroxy, halogen, C 1 -C 6 alkyl or C 1 -C 6 alkoxy; wherein when R ⁴ is H and R ³ and R ⁶ is R ^{3 c} and R ^and, then Q is a radical of formula (gg); (Hh); (Ii); (Jj); (Kk); (11); (Mm); (Nn); a radical of formula (aa) wherein R ²⁷ is cycloalkyl of 3 to 6 carbon atoms or arylalkyl of 1 to 6 carbon atoms in the alkyl radical; a radical of formula (aa) wherein R ²⁷ and R ²⁸ together with the nitrogen atom to which they are attached form a piperazine ring which is optionally substituted with C 1-6 alkyl; a radical of formula (bb) wherein Ŕ ²⁹ represents a hydroxy group on a carbon atom adjacent to a nitrogen atom; a radical of formula (dd) wherein R ³⁵ is a hydrogen atom and R ³³ and R ³⁴ together with the carbon atom to which they are attached form a radical of formula C (O) or a radical of formula (ee) wherein R ⁵⁵ is arylalkyl of 1 to 6 carbon atoms in the alkyl radical; and the pharmaceutically acceptable acid or base addition salts and stereochemically isomeric forms thereof. The dihydrobenzopyran derivatives according to claim 1 of the general formula (I), wherein R ¹ , R ² , R ³ and R ⁴ are as defined in claim 1 and R ⁵ and R ⁶ are as defined in R ^5a and R ^6a , wherein a7) and (a8) t is 2; Q is a radical of formula (aa), (bb), (cc) or (dd), wherein q is 1 or 2, a radical of formula (ee) wherein R ³³ is hydrogen, a radical of formula (ff), (gg) , (hh), (ii), (jj) or (kk), wherein q is 1 or 2, or the remainder of formula (11). The dihydrobenzopyran derivatives according to claim 1 of the general formula (I), wherein R ¹ , R ² and R ³ are as defined in claim 1; R ⁴ is hydrogen or halogen, or C 1 -C 6 alkyl; R ⁵ and R ⁶ have the meaning of R ^{5 b} and R ^b, wherein R ^SB is a hydrogen atom and R ^6b represents a hydroxy C 1 -C 6 alkyl, carboxyalkyl of 1 to 6 carbon atoms in the alkyl moiety, alkoxycarbonylalkyl having 1 to 6 carbon atoms in the alkoxy and 1 to 6 carbon atoms in the alkyl radical or trihalomethyl, the radical of formula (b1), (b2), (b3), (b4), (b5), (b5), (b7), (b8), (b9) , (b12), (b12) or (b12); Q is a radical of formula (aa), (bb), (cc) or (dd), wherein q is 1 or 2, a radical of formula (ee) wherein R ⁵³ is hydrogen, a radical of formula (ff), (gg) , (hh), (ii), (jj) or (kk), wherein q is 1 or 2, or the remainder of formula (11). The dihydrobenzopyran derivatives according to claim 1 of the general formula (I), wherein R ¹ , R ² and R ³ are as defined in claim 1; R ⁴ represents a hydrogen atom; R ⁵ and R ⁶ have the meaning of R ⁵ 'and R ^6c ; Q is a radical of formula (gg); (Hh); (Ii); (jj) or (kk) wherein q is 1 or 2; (11); a radical of formula (bb) wherein R ²⁹ represents a hydroxy group on a carbon atom adjacent to a nitrogen atom; or a radical of formula (dd) wherein R ³³ represents a hydrogen atom, R ³³ and R ³⁴ together with the carbon atom to which they are attached form a group of formula C (O) and q represents 1 or 2. The dihydrobenzopyran derivatives according to claim 1, selected from the group consisting of N - [(2,3,4,7,8,9-hexahydrobenzo [2,1-b: 3,4-b '] dipyran-2-yl) methyl-N'-2-pyrimidinyl-1,3- propanediamine; N - [(2,3,4,7,8,9-hexahydro-cyclopenta [h] -l-benzopyran-2-ylimetyl] -N'-2-pyrimidinyl-l, 3-propanediamine; (±) N - [(2,3,4,8,9,10-hexahydro [2-b: 3,4-b '] dipyran-2-yl) methyl] -BL-2-pyrimidinyl, 3-propanediamine; N - [(3,4,7,8,9,10-hexahydro-2H-naphtho [l, 2-b] pyran-2-yl) methyl] -N'-2-pyrimidinyl-l, 3-propanediamine; N- (4,5-dihydro-1H-imidazol-2-yl) -N '- [(2,3,4,7,8,9-hexahydrocyclopentafh] -1-benzopyran-2-yl) methyl] -1, 3-propanediamine; N - [(2,3,4,7,8,9-hexahydrobenzo [2,1-b: 3,4-b '] dipyran-2-yl) methyl] -N' - (1,4,5, 6-tetrahydro-2-pyrimidinyl) -1,3-propanediamine; N - [(2,3,4,7,8,9-hexahydrocyclopenta [h] -1-benzopyran-2-yl) methyl] -N '- (1,4,5,6-tetrahydro-2-pyrimidinyl) -1,3-propanediamine; N - [(2,3,7,8-tetrahydro-9H-pyrano [2,3-f] -l, 4-benzodioxin-9-yl) methyl] -N '- (l, 4,5,6- tetrahydro-2-pyrimidinyl) -l, 3-propanediamine; N - [(3,4,7,8,9,10-hexahydro-2H-naphtho [l, 2-b] pyran-2-yl) methyl] -N '- (l, 4,5,6-tetrahydro- 2-pyrimidinyl) -l, 3-propándiainín; methyl 3- [6-fluoro-3,4-dihydro-2 - [[[3- (2-pyrimidinyl) propyl] amino] methyl] -2H-l-benzopyran-8-yl] -2-propenoate; N - [[6-fluoro-8- (2-furyl) -3,4-dihydro-2H-l-benzopyran-2-yl] methyl] -N'-2-pyrimidinyl-1,3-propanediamine; N - [[6-fluoro-3,4-dihydro-8- (2-thienyl) -2H-l-benzopyran-2-yl] methyl] -N '- (l, 4,5,6-tetrahydro-2 pyrimidinyl) -l, 3-propanediamine; N - [(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] -N '- (3,4,5,6-tetrahydro-2-pyridyl) -1,3-propanediamine and N ⁴ - [3 - [[(3,4-dihydro-2H-1-benzopyran-2-yl) methyl] amino] propyl] -N ^2- methyl-2,4-pyrimidinediamine and their pharmaceutically acceptable acid addition salts and stereochemically isomeric forms. 6. A pharmaceutical composition comprising a therapeutically effective amount of a dihydrobenzopyran derivative according to claim 1 and a pharmaceutically acceptable carrier. Intermediates for the preparation of dihydrobenzopyran derivatives of formula (I) according to claim 1, the structure of which corresponds to formula (Va) wherein R ³ , R ^3a and R ^6a are as defined in claim 1 and Alk ³ is C 1 -C 4 alkanediyl , their pharmaceutically acceptable addition salts or their stereochemically isomeric forms. The dihydrobenzopyran derivatives according to claim 1 for use in medicine. A process for the preparation of the dihydrobenzopyran derivatives of the general formula (I) according to claim 1, characterized in that a) an intermediate of formula (II) ^R \ _R H ^{RI 0} _rY ^S-Alk-N-Al _a 'NH _(n)> R ² R' R ^'of which R ^1, R ^2, R ^3, R ⁴ , R ⁵ , R ⁶ and R ⁷ , Alk ¹ and Alk ² are as defined in claim 1, reacted with a reagent of formula (III) W'-Q (III), wherein Q is as defined in claim 1 and W ¹ represents a reactive leaving group, to form a compound of formula (I), or b) an acyl derivative of the general formula (IV) wherein R ³ , R ⁴ , R ⁵ and R ⁶ are as defined in claim 1 and Alk ³ is C 1 -C 4 alkanediyl, reducing to form an aldehyde of the general formula (V) wherein R ³ R ⁴ , R ⁵ , R ⁶ and Alk ³ are as defined above and then the resulting aldehyde of formula (V) is subjected to reductive N-alkylation of the intermediate of formula (VI) HN-Alk ¹ -NQ ₁₂ '1 R ² R ¹ (vi), wherein R ¹ , R ² , Alk ¹ and Q are as defined in claim 1, to form a compound of formula (I), or c) a defined amine of formula (VI) is N-alkylated with an intermediate of formula (VII), Ί (VII), wherein R ³ , R ⁴ , R ⁵ , R ⁶ and Alk ¹ are as defined in claim 1 and W ² is reactive a leaving group, to form a compound of formula (I), or is d) an amine of formula (IX) (ix), wherein R ² , R ³ , R ⁴ , R ⁵ , R ⁶ and Alk ¹ are as defined in claim 1 subjected to reductive N-alkylation with an aldehyde of formula (X), □ = CH-Alk ⁴ -NQ I. (x) R ¹ wherein R ¹ and Q are as defined in claim 1 and Al ⁴ is C 2 -C 14 alkanediyl to form a compound of formula (I), and optionally converting the obtained compound of formula (I) to another compound of formula (I) via functional group transformation reactions wherein compounds of formula (I) wherein the group of formula (Q) is a pyrimidinyl or pyridyl radical are optionally converted by catalytic hydrogenation to tetrahydroanalogs of formula (I) or compounds of formula (I) optionally having a (C 3 -C 6) alkynyl or a (C 3 -C 6) alkenyl group optionally converted by hydrogenation to compounds of formula (I) bearing a (C 1 -C 6) alkyl group or compounds of formula (I) bearing a cyano group optionally converted by hydrogenation to the corresponding compounds of formula (I) content or a compound containing an alkoxy substituent is optionally converted by treatment with an acidic reagent such as hydrohalic acid or boron tribromide to compounds of formula (I) containing a hydroxy group or compounds of formula (I) bearing an amino substituent optionally N-acylated or N-alkylated to form the corresponding N-acylated or N-alkylated derivatives of formula (I) and optionally converting a compound of formula (I) by treatment with an acid to its therapeutically active non-toxic acid addition salt or conversely converting an acid addition salt with alkali into the free base and / or preparing stereochemically isomeric forms thereof.